Add client and server patching functionality to support custom authentication domain and token system

Merge branch 'refs/heads/main' into test-mac
Update SERVER.md
2026-02-26 14:51:48 -03:00 · 2026-01-19 16:03:12 +01:00 · 2026-01-19 15:11:19 +01:00 · 2026-01-19 01:55:33 +01:00 · 2026-01-19 01:44:11 +01:00 · 2026-01-19 00:26:32 +01:00
33 changed files with 13052 additions and 6442 deletions
--- a/BUILD.md
+++ b/BUILD.md
@@ -36,19 +36,4 @@ npm run build:mac
 npm run build:all
 ```

-## Output
-
-Built executables will be in the `dist/` directory:
-
- **Windows**: `Hytale F2P Launcher Setup.exe` (NSIS installer) and `Hytale F2P Launcher.exe` (portable)
- **Linux**: `Hytale F2P Launcher.AppImage` and `Hytale F2P Launcher.deb`
- **macOS**: `Hytale F2P Launcher.dmg` and `Hytale F2P Launcher.zip`
-
-## Notes
-
- Icons need to be placed in `build/` directory:
-  - `icon.ico` for Windows
-  - `icon.png` for Linux
-  - `icon.icns` for macOS
- To build for macOS on non-Mac systems, you'll need to run it on a Mac or use a CI/CD service
-
+Built executables will be in the `dist/` directory
--- a/GUI/index.html
+++ b/GUI/index.html
@@ -7,7 +7,7 @@
    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap" rel="stylesheet">
-    <link rel="stylesheet" href="style.css">
+<link rel="stylesheet" href="style.css">
 </head>
 <body class="bg-black text-white overflow-hidden font-sans select-none" tabindex="-1">
    <div class="absolute inset-0 z-0">
@@ -313,6 +313,18 @@
                                            </p>
                                        </div>
                                    </div>
+                                    
+                                    <div class="settings-option">
+                                        <div class="settings-button-group">
+                                            <button id="openGameLocationBtn" class="settings-action-btn" onclick="openGameLocation()">
+                                                <i class="fas fa-folder-open"></i>
+                                                <div class="btn-content">
+                                                    <div class="btn-title">Open Game Location</div>
+                                                    <div class="btn-description">Open the game installation folder</div>
+                                                </div>
+                                            </button>
+                                        </div>
+                                    </div>
                                </div>
                            </div>
                        </div>
@@ -417,7 +429,20 @@
        </div>
    </footer>

-    <script type="module" src="js/script.js"></script>
+    <script type="module" src="js/script.js"></script>    <!-- Discord Notification -->
+    <div id="discordNotification" class="discord-notification">
+        <div class="notification-content">
+            <i class="fab fa-discord"></i>
+            <span class="notification-text">Join our Discord community!</span>
+            <button class="notification-action" onclick="window.electronAPI?.openExternal('https://discord.gg/n6HZ7NwSQd')">
+                Join Discord
+            </button>
+        </div>
+        <button class="notification-close" onclick="closeDiscordNotification()">
+            <i class="fas fa-times"></i>
+        </button>
+    </div>
    <script type="module" src="js/update.js"></script>
 </body>
-</html>
+
+</html>
--- a/GUI/js/install.js
+++ b/GUI/js/install.js
@@ -30,6 +30,24 @@ export function setupInstallation() {
  if (installPlayerName) {
    installPlayerName.addEventListener('change', savePlayerName);
  }
+
+  if (window.electronAPI && window.electronAPI.onProgressUpdate) {
+    window.electronAPI.onProgressUpdate((data) => {
+      if (window.LauncherUI) {
+        window.LauncherUI.showProgress();
+        window.LauncherUI.updateProgress(data);
+      }
+    });
+  }
+
+  if (window.electronAPI && window.electronAPI.onProgressComplete) {
+    window.electronAPI.onProgressComplete(() => {
+      if (window.LauncherUI) {
+        window.LauncherUI.hideProgress();
+      }
+      resetInstallButton();
+    });
+  }
 }

 export async function installGame() {
--- a/GUI/js/launcher.js
+++ b/GUI/js/launcher.js
@@ -31,6 +31,15 @@ export function setupLauncher() {
      }
    });
  }
+
+  if (window.electronAPI && window.electronAPI.onProgressComplete) {
+    window.electronAPI.onProgressComplete(() => {
+      if (window.LauncherUI) {
+        window.LauncherUI.hideProgress();
+      }
+      resetPlayButton();
+    });
+  }
 }

 export async function launch() {
--- a/GUI/js/script.js
+++ b/GUI/js/script.js
@@ -1,9 +1,42 @@
-import './ui.js';
-import './install.js';
-import './launcher.js';
-import './news.js';
-import './mods.js';
-import './players.js';
-import './chat.js';
-import './settings.js';
-
+import './ui.js';
+import './install.js';
+import './launcher.js';
+import './news.js';
+import './mods.js';
+import './players.js';
+import './chat.js';
+import './settings.js';
+
+// Discord notification functions
+window.closeDiscordNotification = function() {
+  const notification = document.getElementById('discordNotification');
+  if (notification) {
+    notification.classList.add('hidden');
+    setTimeout(() => {
+      notification.style.display = 'none';
+    }, 300);
+  }
+};
+
+// Show notification after a delay
+document.addEventListener('DOMContentLoaded', () => {
+  const notification = document.getElementById('discordNotification');
+  if (notification) {
+    // Check if user has previously dismissed the notification
+    const dismissed = localStorage.getItem('discordNotificationDismissed');
+    if (!dismissed) {
+      setTimeout(() => {
+        notification.style.display = 'flex';
+      }, 3000); // Show after 3 seconds
+    } else {
+      notification.style.display = 'none';
+    }
+  }
+});
+
+// Remember when user closes notification
+const originalClose = window.closeDiscordNotification;
+window.closeDiscordNotification = function() {
+  localStorage.setItem('discordNotificationDismissed', 'true');
+  originalClose();
+};
--- a/GUI/js/settings.js
+++ b/GUI/js/settings.js
@@ -119,6 +119,15 @@ async function loadAllSettings() {
  await loadPlayerName();
 }

+async function openGameLocation() {
+  try {
+    if (window.electronAPI && window.electronAPI.openGameLocation) {
+      await window.electronAPI.openGameLocation();
+    }
+  } catch (error) {
+    console.error('Error opening game location:', error);
+  }
+}

 export function getCurrentJavaPath() {
  if (customJavaCheck && customJavaCheck.checked && customJavaPath) {
@@ -135,6 +144,9 @@ export function getCurrentPlayerName() {
  return 'Player';
 }

+// Make openGameLocation globally available
+window.openGameLocation = openGameLocation;
+
 document.addEventListener('DOMContentLoaded', initSettings);

 window.SettingsAPI = {
--- a/GUI/js/ui.js
+++ b/GUI/js/ui.js
@@ -196,8 +196,26 @@ function setupFirstLaunchHandlers() {
    updateProgress(data);
  });
  
+  let lockButtonTimeout = null;
+  
  window.electronAPI.onLockPlayButton((locked) => {
    lockPlayButton(locked);
+    
+    if (locked) {
+      if (lockButtonTimeout) {
+        clearTimeout(lockButtonTimeout);
+      }
+      lockButtonTimeout = setTimeout(() => {
+        console.warn('Play button has been locked for too long, forcing unlock');
+        lockPlayButton(false);
+        lockButtonTimeout = null;
+      }, 20000);
+    } else {
+      if (lockButtonTimeout) {
+        clearTimeout(lockButtonTimeout);
+        lockButtonTimeout = null;
+      }
+    }
  });
 }

@@ -448,6 +466,17 @@ function setupUI() {
  
  lockPlayButton(true);
  
+  setTimeout(() => {
+    const playButton = document.getElementById('homePlayBtn');
+    if (playButton && playButton.getAttribute('data-locked') === 'true') {
+      const spanElement = playButton.querySelector('span');
+      if (spanElement && spanElement.textContent === 'CHECKING...') {
+        console.warn('Play button still locked after startup timeout, forcing unlock');
+        lockPlayButton(false);
+      }
+    }
+  }, 25000);
+  
  handleNavigation();
  setupWindowControls();
  setupSidebarLogo();
--- a/GUI/style.css
+++ b/GUI/style.css
--- a/README.md
+++ b/README.md
@@ -2,10 +2,9 @@

 <div align="center">

-![Version](https://img.shields.io/badge/Version-2.0.0-green?style=for-the-badge)
+![Version](https://img.shields.io/badge/Version-2.0.1-green?style=for-the-badge)
 ![Platform](https://img.shields.io/badge/Platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey?style=for-the-badge)
 ![License](https://img.shields.io/badge/License-Educational-blue?style=for-the-badge)
-[![Join Discord](https://img.shields.io/badge/Discord-Join%20Server-5865F2?logo=discord&logoColor=white)](https://discord.gg/MHkEjepMQ7)

 **A modern, cross-platform offline launcher for Hytale with automatic updates and multiplayer support (windows users & non-premium only)**

@@ -59,23 +58,14 @@
 3. Launch from desktop or start menu

 #### Linux
-See [BUILD.md](BUILD.md) for detailed build instructions.
+See [BUILD.md](BUILD.md) for detailed build instructions or [**Releases**](https://github.com/amiayweb/Hytale-F2P/releases) section.

 #### macOS  
-See [BUILD.md](BUILD.md) for detailed build instructions.
+See [BUILD.md](BUILD.md) for detailed build instructions or [**Releases**](https://github.com/amiayweb/Hytale-F2P/releases) section.

 #### 🖥️ How to create server (Windows Only)?
-1. Download the server files directly from: `http://3.10.208.30:3002/server`
-2. Replace the existing files in your `HytaleF2P` installation folder
-3. Run the server launcher (.bat) to start hosting your own Hytale server
-4. You will need a third party software like Radmin VPN (check on youtube how to use Radmin VPN).
+See [SERVER.md](SERVER.md)
   
-### 🎮 Usage
-
-1. **Enter your player name**
-2. **Click "PLAY"** 
-3. **Automatic setup** - The launcher handles everything automatically
-4. **Game launches** - Enjoy playing Hytale!

 ---

@@ -87,7 +77,17 @@ See [BUILD.md](BUILD.md) for comprehensive build instructions.

 ## 📋 Changelog

-### 🆕 v2.0.0 *(Latest)*
+### 🆕 v2.0.1 *(Latest)*
+- 📊 **Advanced Logging System** - Complete logging with timestamps, file rotation, and session tracking
+- 🔧 **Play Button Fix** - Resolved issue where play button could get stuck in "CHECKING..." state  
+- 💬 **Discord Integration** - Added closable Discord notification for community engagement
+- 📁 **Game Location Access** - New "Open Game Location" button in settings for easy file access
+- 🎯 **UI Polish** - Removed bounce animation from player counter for smoother experience
+- 🛡️ **Stability Improvements** - Enhanced error handling and process lifecycle management
+- ⚡ **Performance Optimizations** - Faster startup times and better resource management
+- 🔄 **Timeout Protection** - Added safety timeouts to prevent launcher freezing
+
+### 🔄 v2.0.0
 - ✅ **Automatic Game Update System** - Smart version checking and seamless updates
 - ✅ **Partial Automatic Launcher Update System** - This will inform you when I release a new update.
 - 🛡️ **UserData Preservation** - Intelligent backup/restore of game saves during updates
@@ -187,11 +187,6 @@ This launcher is created for **educational purposes only**.

 ---

-## 📬 Contact
-
-[![Discord](https://img.shields.io/badge/Discord-amiay3-5865F2?logo=discord&logoColor=white)](https://discord.com/users/1433515183606599873)
-
-
 <div align="center">

 **⭐ Star this project if you found it helpful! ⭐**
--- a/SERVER.md
+++ b/SERVER.md
@@ -0,0 +1,87 @@
+# Hytale F2P Server Setup Guide
+
+## Server File Setup
+
+**Download server file:**
+```
+https://files.hytalef2p.com/server
+```
+
+**Replace the file here:**  
+`<your_path>\HytaleF2P\release\package\game\latest\Server`
+
+If you don't have any custom installation path:
+
+1. Press **WIN + R**  
+2. Type: `%localappdata%\HytaleF2P\release\package\game\latest\Server`  
+3. Press **Enter**
+
+You will be redirected to the correct folder automatically.
+
+## Network Setup - Radmin VPN Required
+
+**Important:** The server only supports third-party software for LAN-style connections. You must use **Radmin VPN** to connect players together.
+
+1. **Download and install [Radmin VPN](https://www.radmin-vpn.com/)**
+2. **Create or join a network** in Radmin VPN
+3. **All players must be connected** to the same Radmin network
+4. **Use the Radmin VPN IP address** to connect to the server
+
+This creates a virtual LAN environment that allows the Hytale server to work properly with multiple players.
+
+## RAM Allocation Guide (Windows)
+
+When you start a Hytale server using `start-server.bat`, Java will use very little memory by default.  
+This can cause slow startup, crashes, or the server not launching at all.
+
+**You should always allocate RAM in your launch command.**
+
+Edit your `start-server.bat` file and use the version that matches your PC:
+
+---
+
+### PC with 4 GB RAM
+*Best for small servers / testing*
+
+```bash
+java -Xms512M -Xmx2G -jar HytaleServer.jar --assets ..\Assets.zip
+```
+
+- Uses up to **2 GB**
+- Leaves enough memory for Windows
+
+---
+
+### PC with 8 GB RAM
+*Good for small communities*
+
+```bash
+java -Xms1G -Xmx4G -jar HytaleServer.jar --assets ..\Assets.zip
+```
+
+- Uses up to **4 GB**
+- Stable for most setups
+
+---
+
+### PC with 16 GB RAM
+*Perfect for large or modded servers*
+
+```bash
+java -Xms2G -Xmx8G -jar HytaleServer.jar --assets ..\Assets.zip
+```
+
+- Uses up to **8 GB**
+- Ideal for heavy worlds and plugins
+
+---
+
+## Tips
+
+- `-Xms` = minimum RAM allocation
+- `-Xmx` = maximum RAM allocation  
+- **Never allocate all your system RAM** — Windows still needs memory to run
+- **Test your configuration** with a small world first
+- **Monitor server performance** and adjust RAM as needed
+
+
--- a/backend/core/config.js
+++ b/backend/core/config.js
@@ -0,0 +1,197 @@
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+// Default auth domain - can be overridden by env var or config
+const DEFAULT_AUTH_DOMAIN = 'sanasol.ws';
+
+// Get auth domain from env, config, or default
+function getAuthDomain() {
+  // First check environment variable
+  if (process.env.HYTALE_AUTH_DOMAIN) {
+    return process.env.HYTALE_AUTH_DOMAIN;
+  }
+  // Then check config file
+  const config = loadConfig();
+  if (config.authDomain) {
+    return config.authDomain;
+  }
+  // Fall back to default
+  return DEFAULT_AUTH_DOMAIN;
+}
+
+// Get full auth server URL
+function getAuthServerUrl() {
+  const domain = getAuthDomain();
+  return `https://sessions.${domain}`;
+}
+
+// Save auth domain to config
+function saveAuthDomain(domain) {
+  saveConfig({ authDomain: domain || DEFAULT_AUTH_DOMAIN });
+}
+
+function getAppDir() {
+  const home = os.homedir();
+  if (process.platform === 'win32') {
+    return path.join(home, 'AppData', 'Local', 'HytaleF2P');
+  } else if (process.platform === 'darwin') {
+    return path.join(home, 'Library', 'Application Support', 'HytaleF2P');
+  } else {
+    return path.join(home, '.hytalef2p');
+  }
+}
+
+const CONFIG_FILE = path.join(getAppDir(), 'config.json');
+
+function loadConfig() {
+  try {
+    if (fs.existsSync(CONFIG_FILE)) {
+      return JSON.parse(fs.readFileSync(CONFIG_FILE, 'utf8'));
+    }
+  } catch (err) {
+    console.log('Notice: could not load config:', err.message);
+  }
+  return {};
+}
+
+function saveConfig(update) {
+  try {
+    const configDir = path.dirname(CONFIG_FILE);
+    if (!fs.existsSync(configDir)) {
+      fs.mkdirSync(configDir, { recursive: true });
+    }
+    const config = loadConfig();
+    const next = { ...config, ...update };
+    fs.writeFileSync(CONFIG_FILE, JSON.stringify(next, null, 2), 'utf8');
+  } catch (err) {
+    console.log('Notice: could not save config:', err.message);
+  }
+}
+
+function saveUsername(username) {
+  saveConfig({ username: username || 'Player' });
+}
+
+function loadUsername() {
+  const config = loadConfig();
+  return config.username || 'Player';
+}
+
+function saveChatUsername(chatUsername) {
+  saveConfig({ chatUsername: chatUsername || '' });
+}
+
+function loadChatUsername() {
+  const config = loadConfig();
+  return config.chatUsername || '';
+}
+
+function getUuidForUser(username) {
+  const { v4: uuidv4 } = require('uuid');
+  const config = loadConfig();
+  const userUuids = config.userUuids || {};
+
+  if (userUuids[username]) {
+    return userUuids[username];
+  }
+
+  const newUuid = uuidv4();
+  userUuids[username] = newUuid;
+  saveConfig({ userUuids });
+
+  return newUuid;
+}
+
+function saveJavaPath(javaPath) {
+  const trimmed = (javaPath || '').trim();
+  saveConfig({ javaPath: trimmed });
+}
+
+function loadJavaPath() {
+  const config = loadConfig();
+  return config.javaPath || '';
+}
+
+function saveInstallPath(installPath) {
+  const trimmed = (installPath || '').trim();
+  saveConfig({ installPath: trimmed });
+}
+
+function loadInstallPath() {
+  const config = loadConfig();
+  return config.installPath || '';
+}
+
+function saveModsToConfig(mods) {
+  try {
+    let config = loadConfig();
+    config.installedMods = mods;
+    
+    const configDir = path.dirname(CONFIG_FILE);
+    if (!fs.existsSync(configDir)) {
+      fs.mkdirSync(configDir, { recursive: true });
+    }
+    
+    fs.writeFileSync(CONFIG_FILE, JSON.stringify(config, null, 2));
+    console.log('Mods saved to config.json');
+  } catch (error) {
+    console.error('Error saving mods to config:', error);
+  }
+}
+
+function loadModsFromConfig() {
+  try {
+    const config = loadConfig();
+    return config.installedMods || [];
+  } catch (error) {
+    console.error('Error loading mods from config:', error);
+    return [];
+  }
+}
+
+function isFirstLaunch() {
+  const config = loadConfig();
+  
+  if ('hasLaunchedBefore' in config) {
+    return !config.hasLaunchedBefore;
+  }
+  
+  const hasUserData = config.installPath || config.username || config.javaPath || 
+                      config.chatUsername || config.userUuids || 
+                      Object.keys(config).length > 0;
+  
+  if (!hasUserData) {
+    return true;
+  }
+  
+  return true;
+}
+
+function markAsLaunched() {
+  saveConfig({ hasLaunchedBefore: true, firstLaunchDate: new Date().toISOString() });
+}
+
+module.exports = {
+  loadConfig,
+  saveConfig,
+  saveUsername,
+  loadUsername,
+  saveChatUsername,
+  loadChatUsername,
+  getUuidForUser,
+  saveJavaPath,
+  loadJavaPath,
+  saveInstallPath,
+  loadInstallPath,
+  saveModsToConfig,
+  loadModsFromConfig,
+  isFirstLaunch,
+  markAsLaunched,
+  CONFIG_FILE,
+  // Auth domain config
+  DEFAULT_AUTH_DOMAIN,
+  getAuthDomain,
+  getAuthServerUrl,
+  saveAuthDomain
+};
--- a/backend/core/paths.js
+++ b/backend/core/paths.js
@@ -0,0 +1,197 @@
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+function getAppDir() {
+  const home = os.homedir();
+  if (process.platform === 'win32') {
+    return path.join(home, 'AppData', 'Local', 'HytaleF2P');
+  } else if (process.platform === 'darwin') {
+    return path.join(home, 'Library', 'Application Support', 'HytaleF2P');
+  } else {
+    return path.join(home, '.hytalef2p');
+  }
+}
+
+const DEFAULT_APP_DIR = getAppDir();
+
+function getResolvedAppDir(customPath) {
+  if (customPath && customPath.trim()) {
+    return path.join(customPath.trim(), 'HytaleF2P');
+  }
+  try {
+    const configFile = path.join(DEFAULT_APP_DIR, 'config.json');
+    if (fs.existsSync(configFile)) {
+      const config = JSON.parse(fs.readFileSync(configFile, 'utf8'));
+      if (config.installPath && config.installPath.trim()) {
+        return path.join(config.installPath.trim(), 'HytaleF2P');
+      }
+    }
+  } catch (err) {
+  }
+  return DEFAULT_APP_DIR;
+}
+
+function expandHome(inputPath) {
+  if (!inputPath) {
+    return inputPath;
+  }
+  if (inputPath === '~') {
+    return os.homedir();
+  }
+  if (inputPath.startsWith('~/') || inputPath.startsWith('~\\')) {
+    return path.join(os.homedir(), inputPath.slice(2));
+  }
+  return inputPath;
+}
+
+const APP_DIR = DEFAULT_APP_DIR;
+const CACHE_DIR = path.join(APP_DIR, 'cache');
+const TOOLS_DIR = path.join(APP_DIR, 'butler');
+const GAME_DIR = path.join(APP_DIR, 'release', 'package', 'game', 'latest');
+const JRE_DIR = path.join(APP_DIR, 'release', 'package', 'jre', 'latest');
+const PLAYER_ID_FILE = path.join(APP_DIR, 'player_id.json');
+
+function getClientCandidates(gameLatest) {
+  const candidates = [];
+  if (process.platform === 'win32') {
+    candidates.push(path.join(gameLatest, 'Client', 'HytaleClient.exe'));
+  } else if (process.platform === 'darwin') {
+    candidates.push(path.join(gameLatest, 'Client', 'Hytale.app', 'Contents', 'MacOS', 'HytaleClient'));
+    candidates.push(path.join(gameLatest, 'Client', 'HytaleClient'));
+  } else {
+    candidates.push(path.join(gameLatest, 'Client', 'HytaleClient'));
+  }
+  return candidates;
+}
+
+function findClientPath(gameLatest) {
+  const candidates = getClientCandidates(gameLatest);
+  for (const candidate of candidates) {
+    if (fs.existsSync(candidate)) {
+      return candidate;
+    }
+  }
+  return null;
+}
+
+function findUserDataPath(gameLatest) {
+  const candidates = [];
+  
+  candidates.push(path.join(gameLatest, 'Client', 'UserData'));
+  
+  candidates.push(path.join(gameLatest, 'Client', 'Hytale.app', 'Contents', 'UserData'));
+  candidates.push(path.join(gameLatest, 'Hytale.app', 'Contents', 'UserData'));
+  candidates.push(path.join(gameLatest, 'UserData'));
+  
+  candidates.push(path.join(gameLatest, 'Client', 'UserData'));
+  
+  for (const candidate of candidates) {
+    if (fs.existsSync(candidate)) {
+      return candidate;
+    }
+  }
+  
+  let defaultPath;
+  if (process.platform === 'darwin') {
+    defaultPath = path.join(gameLatest, 'Client', 'UserData');
+  } else {
+    defaultPath = path.join(gameLatest, 'Client', 'UserData');
+  }
+  
+  if (!fs.existsSync(defaultPath)) {
+    fs.mkdirSync(defaultPath, { recursive: true });
+  }
+  
+  return defaultPath;
+}
+
+function findUserDataRecursive(gameLatest) {
+  function searchDirectory(dir) {
+    try {
+      const items = fs.readdirSync(dir, { withFileTypes: true });
+      
+      for (const item of items) {
+        if (item.isDirectory()) {
+          const fullPath = path.join(dir, item.name);
+          
+          if (item.name === 'UserData') {
+            return fullPath;
+          }
+          
+          const found = searchDirectory(fullPath);
+          if (found) {
+            return found;
+          }
+        }
+      }
+    } catch (error) {
+    }
+    
+    return null;
+  }
+  
+  if (!fs.existsSync(gameLatest)) {
+    return null;
+  }
+  
+  const found = searchDirectory(gameLatest);
+  return found;
+}
+
+async function getModsPath(customInstallPath = null) {
+  try {
+    let installPath = customInstallPath;
+
+    if (!installPath) {
+      const configFile = path.join(DEFAULT_APP_DIR, 'config.json');
+      if (fs.existsSync(configFile)) {
+        const config = JSON.parse(fs.readFileSync(configFile, 'utf8'));
+        installPath = config.installPath || '';
+      }
+    }
+
+    if (!installPath) {
+      const localAppData = process.env.LOCALAPPDATA || path.join(os.homedir(), 'AppData', 'Local');
+      installPath = path.join(localAppData, 'HytaleF2P');
+    } else {
+      installPath = path.join(installPath, 'HytaleF2P');
+    }
+
+    const gameLatest = path.join(installPath, 'release', 'package', 'game', 'latest');
+    
+    const userDataPath = findUserDataPath(gameLatest);
+    
+    const modsPath = path.join(userDataPath, 'Mods');
+    const disabledModsPath = path.join(userDataPath, 'DisabledMods');
+
+    if (!fs.existsSync(modsPath)) {
+      fs.mkdirSync(modsPath, { recursive: true });
+    }
+    if (!fs.existsSync(disabledModsPath)) {
+      fs.mkdirSync(disabledModsPath, { recursive: true });
+    }
+
+    return modsPath;
+  } catch (error) {
+    console.error('Error getting mods path:', error);
+    throw error;
+  }
+}
+
+module.exports = {
+  getAppDir,
+  getResolvedAppDir,
+  expandHome,
+  APP_DIR,
+  CACHE_DIR,
+  TOOLS_DIR,
+  GAME_DIR,
+  JRE_DIR,
+  PLAYER_ID_FILE,
+  getClientCandidates,
+  findClientPath,
+  findUserDataPath,
+  findUserDataRecursive,
+  getModsPath
+};
--- a/backend/launcher.js
+++ b/backend/launcher.js
--- a/backend/logger.js
+++ b/backend/logger.js
@@ -0,0 +1,213 @@
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+class Logger {
+  constructor() {
+    this.logDir = null;
+    this.logFile = null;
+    this.maxLogSize = 10 * 1024 * 1024; // 10MB
+    this.maxLogFiles = 5; 
+    this.originalConsole = {
+      log: console.log,
+      error: console.error,
+      warn: console.warn,
+      info: console.info
+    };
+    
+    this.initializeLogDirectory();
+  }
+
+  getAppDir() {
+    const home = os.homedir();
+    if (process.platform === 'win32') {
+      return path.join(home, 'AppData', 'Local', 'HytaleF2P');
+    } else if (process.platform === 'darwin') {
+      return path.join(home, 'Library', 'Application Support', 'HytaleF2P');
+    } else {
+      return path.join(home, '.hytalef2p');
+    }
+  }
+
+  getInstallPath() {
+    try {
+      const configFile = path.join(this.getAppDir(), 'config.json');
+      if (fs.existsSync(configFile)) {
+        const config = JSON.parse(fs.readFileSync(configFile, 'utf8'));
+        if (config.installPath && config.installPath.trim()) {
+          return path.join(config.installPath.trim(), 'HytaleF2P');
+        }
+      }
+    } catch (err) {
+    }
+    return this.getAppDir();
+  }
+
+  initializeLogDirectory() {
+    try {
+      const installPath = this.getInstallPath();
+      this.logDir = path.join(installPath, 'logs');
+      
+      if (!fs.existsSync(this.logDir)) {
+        fs.mkdirSync(this.logDir, { recursive: true });
+      }
+
+      const today = new Date();
+      const dateString = today.toISOString().split('T')[0]; // YYYY-MM-DD
+      const timeString = today.toISOString().split('T')[1].split('.')[0].replace(/:/g, '-'); // HH-MM-SS
+      this.logFile = path.join(this.logDir, `launcher-${dateString}-${timeString}.log`);
+      
+      this.writeToFile(`\n=== NEW LAUNCHER SESSION - ${today.toISOString()} ===\n`);
+      
+    } catch (error) {
+      this.logDir = path.join(os.tmpdir(), 'HytaleF2P-logs');
+      if (!fs.existsSync(this.logDir)) {
+        fs.mkdirSync(this.logDir, { recursive: true });
+      }
+      const today = new Date();
+      const dateString = today.toISOString().split('T')[0];
+      const timeString = today.toISOString().split('T')[1].split('.')[0].replace(/:/g, '-');
+      this.logFile = path.join(this.logDir, `launcher-${dateString}-${timeString}.log`);
+      this.writeToFile(`\n=== FALLBACK SESSION IN TEMP - ${today.toISOString()} ===\n`);
+    }
+  }
+
+  writeToFile(message) {
+    if (!this.logFile) return;
+    
+    try {
+      if (fs.existsSync(this.logFile)) {
+        const stats = fs.statSync(this.logFile);
+        if (stats.size > this.maxLogSize) {
+          this.rotateLogFile();
+        }
+      }
+      
+      fs.appendFileSync(this.logFile, message, 'utf8');
+    } catch (error) {
+      this.originalConsole.error('Impossible d\'écrire dans le fichier de log:', error.message);
+    }
+  }
+
+  rotateLogFile() {
+    try {
+      const today = new Date();
+      const dateString = today.toISOString().split('T')[0];
+      const timeString = today.toISOString().split('T')[1].split('.')[0].replace(/:/g, '-');
+      
+      const rotatedFile = path.join(this.logDir, `launcher-${dateString}-${timeString}.log`);
+      fs.renameSync(this.logFile, rotatedFile);
+      
+      this.cleanupOldLogs();
+      
+      const newToday = new Date();
+      const newDateString = newToday.toISOString().split('T')[0];
+      const newTimeString = newToday.toISOString().split('T')[1].split('.')[0].replace(/:/g, '-');
+      this.logFile = path.join(this.logDir, `launcher-${newDateString}-${newTimeString}.log`);
+      this.writeToFile(`\n=== LOG ROTATION - ${newToday.toISOString()} ===\n`);
+      
+    } catch (error) {
+      this.originalConsole.error('Erreur lors de la rotation des logs:', error.message);
+    }
+  }
+
+  cleanupOldLogs() {
+    try {
+      const files = fs.readdirSync(this.logDir)
+        .filter(file => file.startsWith('launcher-') && file.endsWith('.log'))
+        .map(file => ({
+          name: file,
+          path: path.join(this.logDir, file),
+          mtime: fs.statSync(path.join(this.logDir, file)).mtime
+        }))
+        .sort((a, b) => b.mtime - a.mtime); 
+
+      if (files.length > this.maxLogFiles) {
+        const filesToDelete = files.slice(this.maxLogFiles);
+        filesToDelete.forEach(file => {
+          try {
+            fs.unlinkSync(file.path);
+          } catch (err) {
+            this.originalConsole.error(`Impossible de supprimer le fichier de log ${file.name}:`, err.message);
+          }
+        });
+      }
+    } catch (error) {
+      this.originalConsole.error('Erreur lors du nettoyage des logs:', error.message);
+    }
+  }
+
+  formatLogMessage(level, ...args) {
+    const timestamp = new Date().toISOString();
+    const message = args.map(arg => {
+      if (typeof arg === 'object') {
+        try {
+          return JSON.stringify(arg, null, 2);
+        } catch (e) {
+          return String(arg);
+        }
+      }
+      return String(arg);
+    }).join(' ');
+    
+    return `[${timestamp}] [${level.toUpperCase()}] ${message}\n`;
+  }
+
+  log(...args) {
+    const logMessage = this.formatLogMessage('info', ...args);
+    this.writeToFile(logMessage);
+    this.originalConsole.log(...args);
+  }
+
+  error(...args) {
+    const logMessage = this.formatLogMessage('error', ...args);
+    this.writeToFile(logMessage);
+    this.originalConsole.error(...args);
+  }
+
+  warn(...args) {
+    const logMessage = this.formatLogMessage('warn', ...args);
+    this.writeToFile(logMessage);
+    this.originalConsole.warn(...args);
+  }
+
+  info(...args) {
+    const logMessage = this.formatLogMessage('info', ...args);
+    this.writeToFile(logMessage);
+    this.originalConsole.info(...args);
+  }
+
+  interceptConsole() {
+    console.log = (...args) => this.log(...args);
+    console.error = (...args) => this.error(...args);
+    console.warn = (...args) => this.warn(...args);
+    console.info = (...args) => this.info(...args);
+    
+    process.on('uncaughtException', (error) => {
+      this.error('Uncaught exception:', error.stack || error.message);
+    });
+    
+    process.on('unhandledRejection', (reason, promise) => {
+      this.error('Unhandled rejection at', promise, 'reason:', reason);
+    });
+  }
+
+  restoreConsole() {
+    console.log = this.originalConsole.log;
+    console.error = this.originalConsole.error;
+    console.warn = this.originalConsole.warn;
+    console.info = this.originalConsole.info;
+  }
+
+  getLogDirectory() {
+    return this.logDir;
+  }
+
+  updateInstallPath() {
+    this.initializeLogDirectory();
+  }
+}
+
+const logger = new Logger();
+
+module.exports = logger;
--- a/backend/managers/butlerManager.js
+++ b/backend/managers/butlerManager.js
@@ -0,0 +1,75 @@
+const fs = require('fs');
+const path = require('path');
+const AdmZip = require('adm-zip');
+const { TOOLS_DIR } = require('../core/paths');
+const { getOS, getArch } = require('../utils/platformUtils');
+const { downloadFile } = require('../utils/fileManager');
+
+async function installButler(toolsDir = TOOLS_DIR) {
+  if (!fs.existsSync(toolsDir)) {
+    fs.mkdirSync(toolsDir, { recursive: true });
+  }
+  
+  const butlerName = process.platform === 'win32' ? 'butler.exe' : 'butler';
+  const butlerPath = path.join(toolsDir, butlerName);
+  const zipPath = path.join(toolsDir, 'butler.zip');
+
+  if (fs.existsSync(butlerPath)) {
+    return butlerPath;
+  }
+
+  let urls = [];
+  const osName = getOS();
+  const arch = getArch();
+  if (osName === 'windows') {
+    urls = ['https://broth.itch.zone/butler/windows-amd64/LATEST/archive/default'];
+  } else if (osName === 'darwin') {
+    if (arch === 'arm64') {
+      urls = [
+        'https://broth.itch.zone/butler/darwin-arm64/LATEST/archive/default',
+        'https://broth.itch.zone/butler/darwin-amd64/LATEST/archive/default'
+      ];
+    } else {
+      urls = ['https://broth.itch.zone/butler/darwin-amd64/LATEST/archive/default'];
+    }
+  } else if (osName === 'linux') {
+    urls = ['https://broth.itch.zone/butler/linux-amd64/LATEST/archive/default'];
+  } else {
+    throw new Error('Operating system not supported');
+  }
+
+  console.log('Fetching Butler tool...');
+  let lastError = null;
+  for (const url of urls) {
+    try {
+      await downloadFile(url, zipPath);
+      lastError = null;
+      break;
+    } catch (error) {
+      lastError = error;
+    }
+  }
+  if (lastError) {
+    throw lastError;
+  }
+
+  console.log('Unpacking Butler...');
+  const zip = new AdmZip(zipPath);
+  zip.extractAllTo(toolsDir, true);
+
+  if (process.platform !== 'win32') {
+    fs.chmodSync(butlerPath, 0o755);
+  }
+
+  try {
+    fs.unlinkSync(zipPath);
+  } catch (err) {
+    console.log('Notice: could not delete butler.zip');
+  }
+
+  return butlerPath;
+}
+
+module.exports = {
+  installButler
+};
--- a/backend/managers/gameLauncher.js
+++ b/backend/managers/gameLauncher.js
@@ -0,0 +1,406 @@
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+const { exec } = require('child_process');
+const { promisify } = require('util');
+const { spawn } = require('child_process');
+const { v4: uuidv4 } = require('uuid');
+const { getResolvedAppDir, findClientPath } = require('../core/paths');
+const { setupWaylandEnvironment } = require('../utils/platformUtils');
+const { saveUsername, saveInstallPath, loadJavaPath, getUuidForUser, getAuthServerUrl, getAuthDomain } = require('../core/config');
+const { resolveJavaPath, getJavaExec, getBundledJavaPath, detectSystemJava, JAVA_EXECUTABLE } = require('./javaManager');
+const { getInstalledClientVersion, getLatestClientVersion } = require('../services/versionManager');
+const { updateGameFiles } = require('./gameManager');
+
+// Client patcher for custom auth server (sanasol.ws)
+let clientPatcher = null;
+try {
+  clientPatcher = require('../utils/clientPatcher');
+} catch (err) {
+  console.log('[Launcher] Client patcher not available:', err.message);
+}
+
+const execAsync = promisify(exec);
+
+// Fetch tokens from the auth server (properly signed with server's Ed25519 key)
+async function fetchAuthTokens(uuid, name) {
+  const authServerUrl = getAuthServerUrl();
+  try {
+    console.log(`Fetching auth tokens from ${authServerUrl}/game-session/child`);
+
+    const response = await fetch(`${authServerUrl}/game-session/child`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json'
+      },
+      body: JSON.stringify({
+        uuid: uuid,
+        name: name,
+        scopes: ['hytale:server', 'hytale:client']
+      })
+    });
+
+    if (!response.ok) {
+      throw new Error(`Auth server returned ${response.status}`);
+    }
+
+    const data = await response.json();
+    console.log('Auth tokens received from server');
+
+    return {
+      identityToken: data.IdentityToken || data.identityToken,
+      sessionToken: data.SessionToken || data.sessionToken
+    };
+  } catch (error) {
+    console.error('Failed to fetch auth tokens:', error.message);
+    // Fallback to local generation if server unavailable
+    return generateLocalTokens(uuid, name);
+  }
+}
+
+// Fallback: Generate tokens locally (won't pass signature validation but allows offline testing)
+function generateLocalTokens(uuid, name) {
+  console.log('Using locally generated tokens (fallback mode)');
+  const authServerUrl = getAuthServerUrl();
+  const now = Math.floor(Date.now() / 1000);
+  const exp = now + 36000;
+
+  const header = Buffer.from(JSON.stringify({
+    alg: 'EdDSA',
+    kid: '2025-10-01',
+    typ: 'JWT'
+  })).toString('base64url');
+
+  const identityPayload = Buffer.from(JSON.stringify({
+    sub: uuid,
+    name: name,
+    username: name,
+    entitlements: ['game.base'],
+    scope: 'hytale:server hytale:client',
+    iat: now,
+    exp: exp,
+    iss: authServerUrl,
+    jti: uuidv4()
+  })).toString('base64url');
+
+  const sessionPayload = Buffer.from(JSON.stringify({
+    sub: uuid,
+    scope: 'hytale:server',
+    iat: now,
+    exp: exp,
+    iss: authServerUrl,
+    jti: uuidv4()
+  })).toString('base64url');
+
+  const signature = crypto.randomBytes(64).toString('base64url');
+
+  return {
+    identityToken: `${header}.${identityPayload}.${signature}`,
+    sessionToken: `${header}.${sessionPayload}.${signature}`
+  };
+}
+
+async function launchGame(playerName = 'Player', progressCallback, javaPathOverride, installPathOverride) {
+  const customAppDir = getResolvedAppDir(installPathOverride);
+  const customGameDir = path.join(customAppDir, 'release', 'package', 'game', 'latest');
+  const customJreDir = path.join(customAppDir, 'release', 'package', 'jre', 'latest');
+  const userDataDir = path.join(customGameDir, 'Client', 'UserData');
+
+  const gameLatest = customGameDir;
+  let clientPath = findClientPath(gameLatest);
+
+  if (!clientPath) {
+    throw new Error('Game is not installed. Please install the game first.');
+  }
+
+  saveUsername(playerName);
+  if (installPathOverride) {
+    saveInstallPath(installPathOverride);
+  }
+
+  const configuredJava = (javaPathOverride !== undefined && javaPathOverride !== null
+    ? javaPathOverride
+    : loadJavaPath() || '').trim();
+  let javaBin = null;
+
+  if (configuredJava) {
+    javaBin = await resolveJavaPath(configuredJava);
+    if (!javaBin) {
+      throw new Error(`Configured Java path not found: ${configuredJava}`);
+    }
+  } else {
+    javaBin = getJavaExec(customJreDir);
+    
+    if (!getBundledJavaPath(customJreDir)) {
+      const fallback = await detectSystemJava();
+      if (fallback) {
+        javaBin = fallback;
+      } else {
+        throw new Error('Java runtime not found. Please install the game first or configure Java path.');
+      }
+    }
+  }
+
+  const uuid = getUuidForUser(playerName);
+
+  // Fetch tokens from auth server
+  if (progressCallback) {
+    progressCallback('Fetching authentication tokens...', null, null, null, null);
+  }
+  const { identityToken, sessionToken } = await fetchAuthTokens(uuid, playerName);
+
+  // Patch client and server binaries to use custom auth server (BEFORE signing on macOS)
+  const authDomain = getAuthDomain();
+  if (clientPatcher) {
+    try {
+      if (progressCallback) {
+        progressCallback('Patching game for custom server...', null, null, null, null);
+      }
+      console.log(`Patching game binaries for ${authDomain}...`);
+
+      const patchResult = await clientPatcher.ensureClientPatched(gameLatest, (msg, percent) => {
+        console.log(`[Patcher] ${msg}`);
+        if (progressCallback && msg) {
+          progressCallback(msg, percent, null, null, null);
+        }
+      });
+
+      if (patchResult.success) {
+        if (patchResult.alreadyPatched) {
+          console.log(`Game already patched for ${authDomain}`);
+        } else {
+          console.log(`Game patched successfully (${patchResult.patchCount} total occurrences)`);
+          if (patchResult.client) {
+            console.log(`  Client: ${patchResult.client.patchCount || 0} occurrences`);
+          }
+          if (patchResult.server) {
+            console.log(`  Server: ${patchResult.server.patchCount || 0} occurrences`);
+          }
+        }
+      } else {
+        console.warn('Game patching failed:', patchResult.error);
+      }
+    } catch (patchError) {
+      console.warn('Game patching failed (game may not connect to custom server):', patchError.message);
+    }
+  }
+
+  // macOS: Sign binaries AFTER patching so the patched binaries have valid signatures
+  if (process.platform === 'darwin') {
+    try {
+      const appBundle = path.join(gameLatest, 'Client', 'Hytale.app');
+      const serverDir = path.join(gameLatest, 'Server');
+
+      const signPath = async (targetPath, deep = false) => {
+        await execAsync(`xattr -cr "${targetPath}"`).catch(() => {});
+        const deepFlag = deep ? '--deep ' : '';
+        await execAsync(`codesign --force ${deepFlag}--sign - "${targetPath}"`).catch(() => {});
+      };
+
+      if (fs.existsSync(appBundle)) {
+        await signPath(appBundle, true);
+        console.log('Signed macOS app bundle (after patching)');
+      } else {
+        await signPath(path.dirname(clientPath), true);
+        console.log('Signed macOS client binary (after patching)');
+      }
+
+      if (javaBin && fs.existsSync(javaBin)) {
+        let jreRoot = path.dirname(path.dirname(javaBin));
+        if (jreRoot.endsWith('Home')) {
+          jreRoot = path.dirname(path.dirname(jreRoot));
+        }
+        await signPath(jreRoot, true);
+        await signPath(javaBin, false);
+        console.log('Signed Java runtime');
+      }
+
+      if (fs.existsSync(serverDir)) {
+        await execAsync(`xattr -cr "${serverDir}"`).catch(() => {});
+        await execAsync(`find "${serverDir}" -type f -perm +111 -exec codesign --force --sign - {} \\;`).catch(() => {});
+        console.log('Signed server binaries (after patching)');
+      }
+
+      if (javaBin && fs.existsSync(javaBin)) {
+        const javaWrapperPath = path.join(path.dirname(javaBin), 'java-wrapper');
+        const wrapperScript = `#!/bin/bash
+# Java wrapper for macOS - adds --disable-sentry to fix Sentry hang issue
+REAL_JAVA="${javaBin}"
+ARGS=("$@")
+for i in "\${!ARGS[@]}"; do
+  if [[ "\${ARGS[$i]}" == *"HytaleServer.jar"* ]]; then
+    ARGS=("\${ARGS[@]:0:$((i+1))}" "--disable-sentry" "\${ARGS[@]:$((i+1))}")
+    break
+  fi
+done
+exec "$REAL_JAVA" "\${ARGS[@]}"
+`;
+        fs.writeFileSync(javaWrapperPath, wrapperScript, { mode: 0o755 });
+        await signPath(javaWrapperPath, false);
+        console.log('Created java wrapper with --disable-sentry fix');
+        javaBin = javaWrapperPath;
+      }
+    } catch (signError) {
+      console.log('Notice: macOS signing step failed:', signError.message);
+      console.log('The game may still launch if Gatekeeper allows it');
+    }
+  }
+
+  const args = [
+    '--app-dir', gameLatest,
+    '--java-exec', javaBin,
+    '--auth-mode', 'authenticated',
+    '--uuid', uuid,
+    '--name', playerName,
+    '--identity-token', identityToken,
+    '--session-token', sessionToken,
+    '--user-dir', userDataDir
+  ];
+
+  if (progressCallback) {
+    progressCallback('Starting game...', null, null, null, null);
+  }
+  console.log('Starting game...');
+  console.log(`Command: "${clientPath}" ${args.join(' ')}`);
+
+  const env = { ...process.env };
+  
+  const waylandEnv = setupWaylandEnvironment();
+  Object.assign(env, waylandEnv);
+
+  try {
+    let spawnOptions = {
+      stdio: ['ignore', 'pipe', 'pipe'],
+      detached: true,
+      env: env
+    };
+
+    if (process.platform === 'win32') {
+      spawnOptions.shell = false; 
+      spawnOptions.windowsHide = true; 
+    }
+
+    const child = spawn(clientPath, args, spawnOptions);
+
+    console.log(`Game process started with PID: ${child.pid}`);
+
+    let hasExited = false;
+    let outputReceived = false;
+
+    child.stdout.on('data', (data) => {
+      outputReceived = true;
+      console.log(`Game output: ${data.toString().trim()}`);
+    });
+
+    child.stderr.on('data', (data) => {
+      outputReceived = true;
+      console.error(`Game error: ${data.toString().trim()}`);
+    });
+
+    child.on('error', (error) => {
+      hasExited = true;
+      console.error(`Failed to start game process: ${error.message}`);
+      if (progressCallback) {
+        progressCallback(`Failed to start game: ${error.message}`, -1, null, null, null);
+      }
+    });
+
+    child.on('exit', (code, signal) => {
+      hasExited = true;
+      if (code !== null) {
+        console.log(`Game process exited with code ${code}`);
+        if (code !== 0 && progressCallback) {
+          progressCallback(`Game exited with error code ${code}`, -1, null, null, null);
+        }
+      } else if (signal) {
+        console.log(`Game process terminated by signal ${signal}`);
+      }
+    });
+
+    setTimeout(() => {
+      if (!hasExited) {
+        console.log('Game appears to be running successfully');
+        child.unref();
+        if (progressCallback) {
+          progressCallback('Game launched successfully', 100, null, null, null);
+        }
+      } else if (!outputReceived) {
+        console.warn('Game process exited immediately with no output - possible issue with game files or dependencies');
+      }
+    }, 3000);
+
+    return { success: true, installed: true, launched: true, pid: child.pid };
+  } catch (spawnError) {
+    console.error(`Error spawning game process: ${spawnError.message}`);
+    if (progressCallback) {
+      progressCallback(`Error launching game: ${spawnError.message}`, -1, null, null, null);
+    }
+    throw spawnError;
+  }
+}
+
+async function launchGameWithVersionCheck(playerName = 'Player', progressCallback, javaPathOverride, installPathOverride) {
+  try {
+    if (progressCallback) {
+      progressCallback('Checking for updates...', 0, null, null, null);
+    }
+
+    const [installedVersion, latestVersion] = await Promise.all([
+      getInstalledClientVersion(),
+      getLatestClientVersion()
+    ]);
+
+    console.log(`Installed version: ${installedVersion}, Latest version: ${latestVersion}`);
+
+    let needsUpdate = false;
+    if (installedVersion && latestVersion && installedVersion !== latestVersion) {
+      needsUpdate = true;
+      console.log('Version mismatch detected, update required');
+    }
+
+    if (needsUpdate) {
+      if (progressCallback) {
+        progressCallback('Game update required, starting update process...', 10, null, null, null);
+      }
+
+      const customAppDir = getResolvedAppDir(installPathOverride);
+      const customGameDir = path.join(customAppDir, 'release', 'package', 'game', 'latest');
+      const customToolsDir = path.join(customAppDir, 'butler');
+      const customCacheDir = path.join(customAppDir, 'cache');
+
+      try {
+        await updateGameFiles(latestVersion, progressCallback, customGameDir, customToolsDir, customCacheDir);
+        console.log('Game updated successfully, waiting before launch...');
+        
+        if (progressCallback) {
+          progressCallback('Preparing game launch...', 90, null, null, null);
+        }
+        await new Promise(resolve => setTimeout(resolve, 3000)); 
+        
+      } catch (updateError) {
+        console.error('Update failed:', updateError);
+        if (progressCallback) {
+          progressCallback(`Update failed: ${updateError.message}`, -1, null, null, null);
+        }
+        throw updateError;
+      }
+    }
+
+    if (progressCallback) {
+      progressCallback('Launching game...', 80, null, null, null);
+    }
+
+    return await launchGame(playerName, progressCallback, javaPathOverride, installPathOverride);
+  } catch (error) {
+    console.error('Error in version check and launch:', error);
+    if (progressCallback) {
+      progressCallback(`Error: ${error.message}`, -1, null, null, null);
+    }
+    throw error;
+  }
+}
+
+module.exports = {
+  launchGame,
+  launchGameWithVersionCheck
+};
--- a/backend/managers/gameManager.js
+++ b/backend/managers/gameManager.js
@@ -0,0 +1,406 @@
+const fs = require('fs');
+const path = require('path');
+const { execFile } = require('child_process');
+const { getResolvedAppDir, findClientPath, findUserDataPath, findUserDataRecursive, GAME_DIR, CACHE_DIR, TOOLS_DIR } = require('../core/paths');
+const { getOS, getArch } = require('../utils/platformUtils');
+const { downloadFile } = require('../utils/fileManager');
+const { getLatestClientVersion, getInstalledClientVersion } = require('../services/versionManager');
+const { installButler } = require('./butlerManager');
+const { checkAndInstallMultiClient } = require('./multiClientManager');
+const { downloadAndReplaceHomePageUI, downloadAndReplaceLogo } = require('./uiFileManager');
+const { saveUsername, saveInstallPath, loadJavaPath, CONFIG_FILE, loadConfig } = require('../core/config');
+const { resolveJavaPath, detectSystemJava, downloadJRE, getJavaExec, getBundledJavaPath } = require('./javaManager');
+
+async function downloadPWR(version = 'release', fileName = '4.pwr', progressCallback, cacheDir = CACHE_DIR) {
+  const osName = getOS();
+  const arch = getArch();
+  const url = `https://game-patches.hytale.com/patches/${osName}/${arch}/${version}/0/${fileName}`;
+  
+  const dest = path.join(cacheDir, fileName);
+
+  if (fs.existsSync(dest)) {
+    console.log('PWR file found in cache:', dest);
+    return dest;
+  }
+
+  console.log('Fetching PWR patch file:', url);
+  await downloadFile(url, dest, progressCallback);
+  console.log('PWR saved to:', dest);
+  
+  return dest;
+}
+
+async function applyPWR(pwrFile, progressCallback, gameDir = GAME_DIR, toolsDir = TOOLS_DIR) {
+  const butlerPath = await installButler(toolsDir);
+  const gameLatest = gameDir;
+  const stagingDir = path.join(gameLatest, 'staging-temp');
+  
+  const clientPath = findClientPath(gameLatest);
+  
+  if (clientPath) {
+    console.log('Game files detected, skipping patch installation.');
+    return;
+  }
+
+  if (!fs.existsSync(gameLatest)) {
+    fs.mkdirSync(gameLatest, { recursive: true });
+  }
+  if (!fs.existsSync(stagingDir)) {
+    fs.mkdirSync(stagingDir, { recursive: true });
+  }
+
+  if (progressCallback) {
+    progressCallback('Installing game patch...', null, null, null, null);
+  }
+
+  console.log('Installing game patch...');
+  
+  if (!fs.existsSync(butlerPath)) {
+    throw new Error(`Butler tool not found at: ${butlerPath}`);
+  }
+  
+  if (!fs.existsSync(pwrFile)) {
+    throw new Error(`PWR file not found at: ${pwrFile}`);
+  }
+
+  const args = [
+    'apply',
+    '--staging-dir',
+    stagingDir,
+    pwrFile,
+    gameLatest
+  ];
+  
+  try {
+    await new Promise((resolve, reject) => {
+      const child = execFile(butlerPath, args, {
+        maxBuffer: 1024 * 1024 * 10,
+        timeout: 600000
+      }, (error, stdout, stderr) => {
+        if (error) {
+          console.error('Butler stderr:', stderr);
+          console.error('Butler stdout:', stdout);
+          reject(new Error(`Patch installation failed: ${error.message}${stderr ? '\n' + stderr : ''}`));
+        } else {
+          resolve();
+        }
+      });
+    });
+  } catch (error) {
+    throw error;
+  }
+
+  if (fs.existsSync(stagingDir)) {
+    fs.rmSync(stagingDir, { recursive: true, force: true });
+  }
+
+  if (progressCallback) {
+    progressCallback('Installation complete', null, null, null, null);
+  }
+  console.log('Installation complete');
+}
+
+async function updateGameFiles(newVersion, progressCallback, gameDir = GAME_DIR, toolsDir = TOOLS_DIR, cacheDir = CACHE_DIR) {
+  let tempUpdateDir;
+  try {
+    if (progressCallback) {
+      progressCallback('Updating game files...', 0, null, null, null);
+    }
+    console.log(`Updating game files to version: ${newVersion}`);
+
+    tempUpdateDir = path.join(gameDir, '..', 'temp_update');
+    
+    if (fs.existsSync(tempUpdateDir)) {
+      fs.rmSync(tempUpdateDir, { recursive: true, force: true });
+    }
+    fs.mkdirSync(tempUpdateDir, { recursive: true });
+
+    if (progressCallback) {
+      progressCallback('Downloading new game version...', 10, null, null, null);
+    }
+    
+    const pwrFile = await downloadPWR('release', newVersion, progressCallback, cacheDir);
+    
+    if (progressCallback) {
+      progressCallback('Extracting new files...', 50, null, null, null);
+    }
+    
+    await applyPWR(pwrFile, progressCallback, tempUpdateDir, toolsDir);
+    
+    if (progressCallback) {
+      progressCallback('Replacing game files...', 80, null, null, null);
+    }
+    
+    let userDataBackup = null;
+    const userDataPath = findUserDataRecursive(gameDir);
+    
+    if (userDataPath && fs.existsSync(userDataPath)) {
+      userDataBackup = path.join(gameDir, '..', 'UserData_backup_' + Date.now());
+      console.log(`Backing up UserData from ${userDataPath} to: ${userDataBackup}`);
+      
+      function copyRecursive(src, dest) {
+        const stat = fs.statSync(src);
+        if (stat.isDirectory()) {
+          if (!fs.existsSync(dest)) {
+            fs.mkdirSync(dest, { recursive: true });
+          }
+          const files = fs.readdirSync(src);
+          for (const file of files) {
+            copyRecursive(path.join(src, file), path.join(dest, file));
+          }
+        } else {
+          fs.copyFileSync(src, dest);
+        }
+      }
+      
+      copyRecursive(userDataPath, userDataBackup);
+    } else {
+      console.log('No UserData folder found in game directory');
+    }
+    
+    if (fs.existsSync(gameDir)) {
+      console.log('Removing old game files...');
+      fs.rmSync(gameDir, { recursive: true, force: true });
+    }
+    
+    fs.renameSync(tempUpdateDir, gameDir);
+    
+    const multiResult = await checkAndInstallMultiClient(gameDir, progressCallback);
+    console.log('Multiplayer-client check result after update:', multiResult);
+    
+    const homeUIResult = await downloadAndReplaceHomePageUI(gameDir, progressCallback);
+    console.log('HomePage.ui update result after update:', homeUIResult);
+    
+    const logoResult = await downloadAndReplaceLogo(gameDir, progressCallback);
+    console.log('Logo@2x.png update result after update:', logoResult);
+    
+    if (userDataBackup && fs.existsSync(userDataBackup)) {
+      const newUserDataPath = findUserDataPath(gameDir);
+      const userDataParent = path.dirname(newUserDataPath);
+      
+      if (!fs.existsSync(userDataParent)) {
+        fs.mkdirSync(userDataParent, { recursive: true });
+      }
+      
+      console.log(`Restoring UserData to: ${newUserDataPath}`);
+      
+      function copyRecursive(src, dest) {
+        const stat = fs.statSync(src);
+        if (stat.isDirectory()) {
+          if (!fs.existsSync(dest)) {
+            fs.mkdirSync(dest, { recursive: true });
+          }
+          const files = fs.readdirSync(src);
+          for (const file of files) {
+            copyRecursive(path.join(src, file), path.join(dest, file));
+          }
+        } else {
+          fs.copyFileSync(src, dest);
+        }
+      }
+      
+      copyRecursive(userDataBackup, newUserDataPath);
+    }
+    
+    console.log(`Game files updated successfully to version: ${newVersion}`);
+    
+    if (userDataBackup && fs.existsSync(userDataBackup)) {
+      try {
+        fs.rmSync(userDataBackup, { recursive: true, force: true });
+        console.log('UserData backup cleaned up');
+      } catch (cleanupError) {
+        console.warn('Could not clean up UserData backup:', cleanupError.message);
+      }
+    }
+    
+    console.log('Waiting for file system sync...');
+    await new Promise(resolve => setTimeout(resolve, 2000)); 
+    
+    if (progressCallback) {
+      progressCallback('Game update completed', 100, null, null, null);
+    }
+    
+    return { success: true, updated: true, version: newVersion };
+  } catch (error) {
+    console.error('Error updating game files:', error);
+    
+    if (userDataBackup && fs.existsSync(userDataBackup)) {
+      try {
+        fs.rmSync(userDataBackup, { recursive: true, force: true });
+        console.log('UserData backup cleaned up after error');
+      } catch (cleanupError) {
+        console.warn('Could not clean up UserData backup:', cleanupError.message);
+      }
+    }
+    
+    if (tempUpdateDir && fs.existsSync(tempUpdateDir)) {
+      fs.rmSync(tempUpdateDir, { recursive: true, force: true });
+    }
+    
+    throw new Error(`Failed to update game files: ${error.message}`);
+  }
+}
+
+function isGameInstalled() {
+  const appDir = getResolvedAppDir();
+  const gameDir = path.join(appDir, 'release', 'package', 'game', 'latest');
+  const clientPath = findClientPath(gameDir);
+  return clientPath !== null;
+}
+
+async function installGame(playerName = 'Player', progressCallback, javaPathOverride, installPathOverride) {
+  const customAppDir = getResolvedAppDir(installPathOverride);
+  const customCacheDir = path.join(customAppDir, 'cache');
+  const customToolsDir = path.join(customAppDir, 'butler');
+  const customGameDir = path.join(customAppDir, 'release', 'package', 'game', 'latest');
+  const customJreDir = path.join(customAppDir, 'release', 'package', 'jre', 'latest');
+  const userDataDir = path.join(customGameDir, 'Client', 'UserData');
+
+  [customAppDir, customCacheDir, customToolsDir].forEach(dir => {
+    if (!fs.existsSync(dir)) {
+      fs.mkdirSync(dir, { recursive: true });
+    }
+  });
+
+  if (!fs.existsSync(userDataDir)) {
+    fs.mkdirSync(userDataDir, { recursive: true });
+  }
+
+  saveUsername(playerName);
+  if (installPathOverride) {
+    saveInstallPath(installPathOverride);
+  }
+
+  const gameLatest = customGameDir;
+  let clientPath = findClientPath(gameLatest);
+
+  if (clientPath) {
+    if (progressCallback) {
+      progressCallback('Game already installed', 100, null, null, null);
+    }
+    console.log('Game is already installed');
+    return { success: true, alreadyInstalled: true };
+  }
+
+  const configuredJava = (javaPathOverride !== undefined && javaPathOverride !== null
+    ? javaPathOverride
+    : loadJavaPath() || '').trim();
+  let javaBin = null;
+
+  if (configuredJava) {
+    javaBin = await resolveJavaPath(configuredJava);
+    if (!javaBin) {
+      throw new Error(`Configured Java path not found: ${configuredJava}`);
+    }
+  } else {
+    try {
+      await downloadJRE(progressCallback, customCacheDir, customJreDir);
+    } catch (error) {
+      const fallback = await detectSystemJava();
+      if (fallback) {
+        javaBin = fallback;
+      } else {
+        throw error;
+      }
+    }
+
+    if (!javaBin) {
+      javaBin = getJavaExec(customJreDir);
+    }
+  }
+
+  if (progressCallback) {
+    progressCallback('Fetching game files...', null, null, null, null);
+  }
+  console.log('Installing game files...');
+  
+  const latestVersion = await getLatestClientVersion();
+  const pwrFile = await downloadPWR('release', latestVersion, progressCallback, customCacheDir);
+  await applyPWR(pwrFile, progressCallback, customGameDir, customToolsDir);
+  
+  const multiResult = await checkAndInstallMultiClient(customGameDir, progressCallback);
+  console.log('Multiplayer check result:', multiResult);
+  
+  const homeUIResult = await downloadAndReplaceHomePageUI(customGameDir, progressCallback);
+  console.log('HomePage.ui update result after installation:', homeUIResult);
+  
+  const logoResult = await downloadAndReplaceLogo(customGameDir, progressCallback);
+  console.log('Logo@2x.png update result after installation:', logoResult);
+  
+  if (progressCallback) {
+    progressCallback('Installation complete', 100, null, null, null);
+  }
+  console.log('Game installation completed successfully');
+  
+  return { 
+    success: true, 
+    installed: true, 
+    multiClient: multiResult 
+  };
+}
+
+async function uninstallGame() {
+  const appDir = getResolvedAppDir();
+  
+  if (!fs.existsSync(appDir)) {
+    throw new Error('Game is not installed');
+  }
+
+  try {
+    fs.rmSync(appDir, { recursive: true, force: true });
+    console.log('Game uninstalled successfully - removed entire HytaleF2P folder');
+    
+    if (fs.existsSync(CONFIG_FILE)) {
+      const config = loadConfig();
+      delete config.installPath;
+      fs.writeFileSync(CONFIG_FILE, JSON.stringify(config, null, 2), 'utf8');
+    }
+  } catch (error) {
+    throw new Error(`Failed to uninstall game: ${error.message}`);
+  }
+}
+
+function checkExistingGameInstallation() {
+  try {
+    const config = loadConfig();
+    
+    if (!config.installPath || !config.installPath.trim()) {
+      return null;
+    }
+    
+    const installPath = config.installPath.trim();
+    const gameDir = path.join(installPath, 'HytaleF2P', 'release', 'package', 'game', 'latest');
+    
+    if (!fs.existsSync(gameDir)) {
+      return null;
+    }
+    
+    const clientPath = findClientPath(gameDir);
+    if (!clientPath) {
+      return null;
+    }
+    
+    const userDataPath = findUserDataRecursive(gameDir);
+    
+    return {
+      gameDir: gameDir,
+      clientPath: clientPath,
+      userDataPath: userDataPath,
+      installPath: installPath,
+      hasUserData: userDataPath && fs.existsSync(userDataPath)
+    };
+  } catch (error) {
+    console.error('Error checking existing game installation:', error);
+    return null;
+  }
+}
+
+module.exports = {
+  downloadPWR,
+  applyPWR,
+  updateGameFiles,
+  isGameInstalled,
+  installGame,
+  uninstallGame,
+  checkExistingGameInstallation
+};
--- a/backend/managers/javaManager.js
+++ b/backend/managers/javaManager.js
@@ -0,0 +1,363 @@
+const fs = require('fs');
+const path = require('path');
+const { execFile } = require('child_process');
+const { promisify } = require('util');
+const axios = require('axios');
+const AdmZip = require('adm-zip');
+const crypto = require('crypto');
+const tar = require('tar');
+const { expandHome, JRE_DIR } = require('../core/paths');
+const { getOS, getArch } = require('../utils/platformUtils');
+const { loadConfig } = require('../core/config');
+const { downloadFile } = require('../utils/fileManager');
+
+const execFileAsync = promisify(execFile);
+const JAVA_EXECUTABLE = 'java' + (process.platform === 'win32' ? '.exe' : '');
+
+async function findJavaOnPath(commandName = 'java') {
+  const lookupCmd = process.platform === 'win32' ? 'where' : 'which';
+  try {
+    const { stdout } = await execFileAsync(lookupCmd, [commandName]);
+    const line = stdout.split(/\r?\n/).map(lineItem => lineItem.trim()).find(Boolean);
+    return line || null;
+  } catch (err) {
+    return null;
+  }
+}
+
+async function getMacJavaHome() {
+  if (process.platform !== 'darwin') {
+    return null;
+  }
+  try {
+    const { stdout } = await execFileAsync('/usr/libexec/java_home');
+    const home = stdout.trim();
+    if (!home) {
+      return null;
+    }
+    return path.join(home, 'bin', JAVA_EXECUTABLE);
+  } catch (err) {
+    return null;
+  }
+}
+
+async function resolveJavaPath(inputPath) {
+  const trimmed = (inputPath || '').trim();
+  if (!trimmed) {
+    return null;
+  }
+
+  const expanded = expandHome(trimmed);
+  if (fs.existsSync(expanded)) {
+    const stat = fs.statSync(expanded);
+    if (stat.isDirectory()) {
+      const candidate = path.join(expanded, 'bin', JAVA_EXECUTABLE);
+      return fs.existsSync(candidate) ? candidate : null;
+    }
+    return expanded;
+  }
+
+  if (!path.isAbsolute(expanded)) {
+    return await findJavaOnPath(trimmed);
+  }
+
+  return null;
+}
+
+async function detectSystemJava() {
+  const envHome = process.env.JAVA_HOME;
+  if (envHome) {
+    const envJava = path.join(envHome, 'bin', JAVA_EXECUTABLE);
+    if (fs.existsSync(envJava)) {
+      return envJava;
+    }
+  }
+
+  const macJava = await getMacJavaHome();
+  if (macJava && fs.existsSync(macJava)) {
+    return macJava;
+  }
+
+  const pathJava = await findJavaOnPath('java');
+  if (pathJava && fs.existsSync(pathJava)) {
+    return pathJava;
+  }
+
+  return null;
+}
+
+function loadJavaPath() {
+  const config = loadConfig();
+  return config.javaPath || '';
+}
+
+function getBundledJavaPath(jreDir = JRE_DIR) {
+  const candidates = [
+    path.join(jreDir, 'bin', JAVA_EXECUTABLE)
+  ];
+
+  if (process.platform === 'darwin') {
+    candidates.push(path.join(jreDir, 'Contents', 'Home', 'bin', JAVA_EXECUTABLE));
+  }
+
+  for (const candidate of candidates) {
+    if (fs.existsSync(candidate)) {
+      return candidate;
+    }
+  }
+
+  return null;
+}
+
+function getJavaExec(jreDir = JRE_DIR) {
+  const bundledJava = getBundledJavaPath(jreDir);
+  if (bundledJava) {
+    return bundledJava;
+  }
+
+  console.log('Notice: Java runtime not found, using system default');
+  return 'java';
+}
+
+async function getJavaDetection() {
+  const candidates = [];
+  const bundledJava = getBundledJavaPath() || path.join(JRE_DIR, 'bin', JAVA_EXECUTABLE);
+
+  candidates.push({
+    label: 'Bundled JRE',
+    path: bundledJava,
+    exists: fs.existsSync(bundledJava)
+  });
+
+  const javaHomeEnv = process.env.JAVA_HOME;
+  if (javaHomeEnv) {
+    const envJava = path.join(javaHomeEnv, 'bin', JAVA_EXECUTABLE);
+    candidates.push({
+      label: 'JAVA_HOME',
+      path: envJava,
+      exists: fs.existsSync(envJava),
+      note: fs.existsSync(envJava) ? '' : 'Not found'
+    });
+  } else {
+    candidates.push({
+      label: 'JAVA_HOME',
+      path: '',
+      exists: false,
+      note: 'Not set'
+    });
+  }
+
+  if (process.platform === 'darwin') {
+    const macJava = await getMacJavaHome();
+    if (macJava) {
+      candidates.push({
+        label: 'java_home',
+        path: macJava,
+        exists: fs.existsSync(macJava),
+        note: fs.existsSync(macJava) ? '' : 'Not found'
+      });
+    } else {
+      candidates.push({
+        label: 'java_home',
+        path: '',
+        exists: false,
+        note: 'Not found'
+      });
+    }
+  }
+
+  const pathJava = await findJavaOnPath('java');
+  if (pathJava) {
+    candidates.push({
+      label: 'PATH',
+      path: pathJava,
+      exists: true
+    });
+  } else {
+    candidates.push({
+      label: 'PATH',
+      path: '',
+      exists: false,
+      note: 'java not found'
+    });
+  }
+
+  return {
+    javaPath: loadJavaPath(),
+    candidates
+  };
+}
+
+async function downloadJRE(progressCallback, cacheDir, jreDir = JRE_DIR) {
+  if (!fs.existsSync(cacheDir)) {
+    fs.mkdirSync(cacheDir, { recursive: true });
+  }
+  
+  const osName = getOS();
+  const arch = getArch();
+
+  const bundledJava = getBundledJavaPath(jreDir);
+  if (bundledJava) {
+    console.log('Java runtime found, skipping download');
+    return;
+  }
+
+  console.log('Requesting Java runtime information...');
+  const response = await axios.get('https://launcher.hytale.com/version/release/jre.json', {
+    headers: {
+      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+      'Accept': 'application/json',
+      'Accept-Language': 'en-US,en;q=0.9'
+    }
+  });
+  const jreData = response.data;
+
+  const osData = jreData.download_url[osName];
+  if (!osData) {
+    throw new Error(`Java runtime unavailable for platform: ${osName}`);
+  }
+
+  const platform = osData[arch];
+  if (!platform) {
+    throw new Error(`Java runtime unavailable for architecture ${arch} on ${osName}`);
+  }
+
+  const fileName = path.basename(platform.url);
+  const cacheFile = path.join(cacheDir, fileName);
+
+  if (!fs.existsSync(cacheFile)) {
+    if (progressCallback) {
+      progressCallback('Fetching Java runtime...', null, null, null, null);
+    }
+    console.log('Fetching Java runtime...');
+    await downloadFile(platform.url, cacheFile, progressCallback);
+    console.log('Download finished');
+  }
+
+  if (progressCallback) {
+    progressCallback('Validating files...', null, null, null, null);
+  }
+  console.log('Validating files...');
+  const fileBuffer = fs.readFileSync(cacheFile);
+  const hashSum = crypto.createHash('sha256');
+  hashSum.update(fileBuffer);
+  const hex = hashSum.digest('hex');
+  
+  if (hex !== platform.sha256) {
+    fs.unlinkSync(cacheFile);
+    throw new Error(`File validation failed: expected ${platform.sha256} but got ${hex}`);
+  }
+
+  if (progressCallback) {
+    progressCallback('Unpacking Java runtime...', null, null, null, null);
+  }
+  console.log('Unpacking Java runtime...');
+  await extractJRE(cacheFile, jreDir);
+
+  if (process.platform !== 'win32') {
+    const javaCandidates = [
+      path.join(jreDir, 'bin', JAVA_EXECUTABLE),
+      path.join(jreDir, 'Contents', 'Home', 'bin', JAVA_EXECUTABLE)
+    ];
+    for (const javaPath of javaCandidates) {
+      if (fs.existsSync(javaPath)) {
+        fs.chmodSync(javaPath, 0o755);
+      }
+    }
+  }
+
+  flattenJREDir(jreDir);
+
+  try {
+    fs.unlinkSync(cacheFile);
+  } catch (err) {
+    console.log('Notice: could not delete cached Java files:', err.message);
+  }
+
+  console.log('Java runtime ready');
+}
+
+async function extractJRE(archivePath, destDir) {
+  if (fs.existsSync(destDir)) {
+    fs.rmSync(destDir, { recursive: true, force: true });
+  }
+  fs.mkdirSync(destDir, { recursive: true });
+
+  if (archivePath.endsWith('.zip')) {
+    return extractZip(archivePath, destDir);
+  } else if (archivePath.endsWith('.tar.gz')) {
+    return extractTarGz(archivePath, destDir);
+  } else {
+    throw new Error(`Archive type not supported: ${archivePath}`);
+  }
+}
+
+function extractZip(zipPath, dest) {
+  const zip = new AdmZip(zipPath);
+  const entries = zip.getEntries();
+
+  for (const entry of entries) {
+    const entryPath = path.join(dest, entry.entryName);
+    
+    const resolvedPath = path.resolve(entryPath);
+    const resolvedDest = path.resolve(dest);
+    if (!resolvedPath.startsWith(resolvedDest)) {
+      throw new Error(`Invalid file path detected: ${entryPath}`);
+    }
+
+    if (entry.isDirectory) {
+      fs.mkdirSync(entryPath, { recursive: true });
+    } else {
+      fs.mkdirSync(path.dirname(entryPath), { recursive: true });
+      fs.writeFileSync(entryPath, entry.getData());
+      if (process.platform !== 'win32') {
+        fs.chmodSync(entryPath, entry.header.attr >>> 16);
+      }
+    }
+  }
+}
+
+function extractTarGz(tarGzPath, dest) {
+  return tar.extract({
+    file: tarGzPath,
+    cwd: dest,
+    strip: 0
+  });
+}
+
+function flattenJREDir(jreLatest) {
+  try {
+    const entries = fs.readdirSync(jreLatest, { withFileTypes: true });
+    
+    if (entries.length !== 1 || !entries[0].isDirectory()) {
+      return;
+    }
+
+    const nested = path.join(jreLatest, entries[0].name);
+    const files = fs.readdirSync(nested, { withFileTypes: true });
+
+    for (const file of files) {
+      const oldPath = path.join(nested, file.name);
+      const newPath = path.join(jreLatest, file.name);
+      fs.renameSync(oldPath, newPath);
+    }
+
+    fs.rmSync(nested, { recursive: true, force: true });
+  } catch (err) {
+    console.log('Notice: could not restructure Java directory:', err.message);
+  }
+}
+
+module.exports = {
+  findJavaOnPath,
+  getMacJavaHome,
+  resolveJavaPath,
+  detectSystemJava,
+  loadJavaPath,
+  getBundledJavaPath,
+  getJavaExec,
+  getJavaDetection,
+  downloadJRE,
+  extractJRE,
+  JAVA_EXECUTABLE
+};
--- a/backend/managers/modManager.js
+++ b/backend/managers/modManager.js
@@ -0,0 +1,276 @@
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+const axios = require('axios');
+const { getModsPath } = require('../core/paths');
+const { saveModsToConfig, loadModsFromConfig } = require('../core/config');
+
+function generateModId(filename) {
+  return crypto.createHash('md5').update(filename).digest('hex').substring(0, 8);
+}
+
+function extractModName(filename) {
+  let name = path.parse(filename).name;
+  
+  name = name.replace(/-v?\d+\.[\d\.]+.*$/i, '');
+  name = name.replace(/-\d+\.[\d\.]+.*$/i, '');
+  
+  name = name.replace(/[-_]/g, ' ');
+  name = name.replace(/\b\w/g, l => l.toUpperCase());
+  
+  return name || 'Unknown Mod';
+}
+
+function extractVersion(filename) {
+  const versionMatch = filename.match(/v?(\d+\.[\d\.]+)/);
+  return versionMatch ? versionMatch[1] : null;
+}
+
+async function loadInstalledMods(modsPath) {
+  try {
+    const configMods = loadModsFromConfig();
+    const modsMap = new Map();
+    
+    configMods.forEach(mod => {
+      modsMap.set(mod.fileName, mod);
+    });
+    
+    if (fs.existsSync(modsPath)) {
+      const files = fs.readdirSync(modsPath);
+      
+      for (const file of files) {
+        const filePath = path.join(modsPath, file);
+        const stats = fs.statSync(filePath);
+        
+        if (stats.isFile() && (file.endsWith('.jar') || file.endsWith('.zip'))) {
+          const configMod = modsMap.get(file);
+          
+          const modInfo = {
+            id: configMod?.id || generateModId(file),
+            name: configMod?.name || extractModName(file),
+            version: configMod?.version || extractVersion(file) || '1.0.0',
+            description: configMod?.description || 'Installed mod',
+            author: configMod?.author || 'Unknown',
+            enabled: true,
+            filePath: filePath,
+            fileName: file,
+            fileSize: configMod?.fileSize || stats.size,
+            dateInstalled: configMod?.dateInstalled || stats.birthtime || stats.mtime,
+            curseForgeId: configMod?.curseForgeId,
+            curseForgeFileId: configMod?.curseForgeFileId
+          };
+          
+          modsMap.set(file, modInfo);
+        }
+      }
+    }
+    
+    const disabledModsPath = path.join(path.dirname(modsPath), 'DisabledMods');
+    if (fs.existsSync(disabledModsPath)) {
+      const files = fs.readdirSync(disabledModsPath);
+      
+      for (const file of files) {
+        const filePath = path.join(disabledModsPath, file);
+        const stats = fs.statSync(filePath);
+        
+        if (stats.isFile() && (file.endsWith('.jar') || file.endsWith('.zip'))) {
+          const configMod = modsMap.get(file);
+          
+          const modInfo = {
+            id: configMod?.id || generateModId(file),
+            name: configMod?.name || extractModName(file),
+            version: configMod?.version || extractVersion(file) || '1.0.0',
+            description: configMod?.description || 'Disabled mod',
+            author: configMod?.author || 'Unknown',
+            enabled: false,
+            filePath: filePath,
+            fileName: file,
+            fileSize: configMod?.fileSize || stats.size,
+            dateInstalled: configMod?.dateInstalled || stats.birthtime || stats.mtime,
+            curseForgeId: configMod?.curseForgeId,
+            curseForgeFileId: configMod?.curseForgeFileId
+          };
+          
+          modsMap.set(file, modInfo);
+        }
+      }
+    }
+    
+    return Array.from(modsMap.values());
+  } catch (error) {
+    console.error('Error loading installed mods:', error);
+    return [];
+  }
+}
+
+async function downloadMod(modInfo) {
+  try {
+    const modsPath = await getModsPath();
+    
+    if (!modInfo.downloadUrl && !modInfo.fileId) {
+      throw new Error('No download URL or file ID provided');
+    }
+    
+    let downloadUrl = modInfo.downloadUrl;
+    
+    if (!downloadUrl && modInfo.fileId && modInfo.modId) {
+      const response = await axios.get(`https://api.curseforge.com/v1/mods/${modInfo.modId}/files/${modInfo.fileId}`, {
+        headers: {
+          'x-api-key': modInfo.apiKey,
+          'Accept': 'application/json'
+        }
+      });
+      
+      downloadUrl = response.data.data.downloadUrl;
+    }
+    
+    if (!downloadUrl) {
+      throw new Error('Could not determine download URL');
+    }
+    
+    const fileName = modInfo.fileName || `mod-${modInfo.modId}.jar`;
+    const filePath = path.join(modsPath, fileName);
+    
+    const response = await axios({
+      method: 'get',
+      url: downloadUrl,
+      responseType: 'stream'
+    });
+    
+    const writer = fs.createWriteStream(filePath);
+    response.data.pipe(writer);
+    
+    return new Promise((resolve, reject) => {
+      writer.on('finish', () => {
+        const configMods = loadModsFromConfig();
+        const newMod = {
+          id: modInfo.id || generateModId(fileName),
+          name: modInfo.name || extractModName(fileName),
+          version: modInfo.version || '1.0.0',
+          description: modInfo.summary || modInfo.description || 'Downloaded from CurseForge',
+          author: modInfo.author || 'Unknown',
+          enabled: true,
+          fileName: fileName,
+          fileSize: fs.statSync(filePath).size,
+          dateInstalled: new Date().toISOString(),
+          curseForgeId: modInfo.modId,
+          curseForgeFileId: modInfo.fileId
+        };
+        
+        configMods.push(newMod);
+        saveModsToConfig(configMods);
+        
+        resolve({
+          success: true,
+          filePath: filePath,
+          fileName: fileName,
+          modInfo: newMod
+        });
+      });
+      writer.on('error', reject);
+    });
+    
+  } catch (error) {
+    console.error('Error downloading mod:', error);
+    return {
+      success: false,
+      error: error.message
+    };
+  }
+}
+
+async function uninstallMod(modId, modsPath) {
+  try {
+    const configMods = loadModsFromConfig();
+    const mod = configMods.find(m => m.id === modId);
+    
+    if (!mod) {
+      throw new Error('Mod not found in config');
+    }
+    
+    const disabledModsPath = path.join(path.dirname(modsPath), 'DisabledMods');
+    const enabledPath = path.join(modsPath, mod.fileName);
+    const disabledPath = path.join(disabledModsPath, mod.fileName);
+    
+    let fileRemoved = false;
+    if (fs.existsSync(enabledPath)) {
+      fs.unlinkSync(enabledPath);
+      fileRemoved = true;
+      console.log('Removed mod from Mods folder:', enabledPath);
+    } else if (fs.existsSync(disabledPath)) {
+      fs.unlinkSync(disabledPath);
+      fileRemoved = true;
+      console.log('Removed mod from DisabledMods folder:', disabledPath);
+    }
+    
+    if (!fileRemoved) {
+      console.warn('Mod file not found on filesystem, removing from config anyway');
+    }
+    
+    const updatedMods = configMods.filter(m => m.id !== modId);
+    saveModsToConfig(updatedMods);
+    console.log('Mod removed from config.json');
+    
+    return { success: true };
+  } catch (error) {
+    console.error('Error uninstalling mod:', error);
+    return {
+      success: false,
+      error: error.message
+    };
+  }
+}
+
+async function toggleMod(modId, modsPath) {
+  try {
+    const mods = await loadInstalledMods(modsPath);
+    const mod = mods.find(m => m.id === modId);
+    
+    if (!mod) {
+      throw new Error('Mod not found');
+    }
+
+    const disabledModsPath = path.join(path.dirname(modsPath), 'DisabledMods');
+    if (!fs.existsSync(disabledModsPath)) {
+      fs.mkdirSync(disabledModsPath, { recursive: true });
+    }
+
+    const currentPath = mod.filePath;
+    let newPath, newEnabled;
+
+    if (mod.enabled) {
+      newPath = path.join(disabledModsPath, path.basename(currentPath));
+      newEnabled = false;
+    } else {
+      newPath = path.join(modsPath, path.basename(currentPath));
+      newEnabled = true;
+    }
+
+    fs.renameSync(currentPath, newPath);
+    
+    const configMods = loadModsFromConfig();
+    const configModIndex = configMods.findIndex(m => m.id === modId);
+    if (configModIndex !== -1) {
+      configMods[configModIndex].enabled = newEnabled;
+      saveModsToConfig(configMods);
+    }
+    
+    return { success: true, enabled: newEnabled };
+  } catch (error) {
+    console.error('Error toggling mod:', error);
+    return {
+      success: false,
+      error: error.message
+    };
+  }
+}
+
+module.exports = {
+  loadInstalledMods,
+  downloadMod,
+  uninstallMod,
+  toggleMod,
+  generateModId,
+  extractModName,
+  extractVersion
+};
--- a/backend/managers/multiClientManager.js
+++ b/backend/managers/multiClientManager.js
@@ -0,0 +1,86 @@
+const fs = require('fs');
+const path = require('path');
+const { findClientPath } = require('../core/paths');
+const { downloadFile } = require('../utils/fileManager');
+const { getLatestClientVersion, getMultiClientVersion } = require('../services/versionManager');
+
+async function downloadMultiClient(gameDir, progressCallback) {
+  try {
+    if (process.platform !== 'win32') {
+      console.log('Multiplayer-client is only available for Windows');
+      return { success: false, reason: 'Platform not supported' };
+    }
+
+    const clientPath = findClientPath(gameDir);
+    if (!clientPath) {
+      throw new Error('Game client not found. Install game first.');
+    }
+
+    console.log('Downloading Multiplayer from server...');
+    if (progressCallback) {
+      progressCallback('Downloading Multiplayer...', null, null, null, null);
+    }
+
+    const clientUrl = 'http://3.10.208.30:3002/client';
+    const tempClientPath = path.join(path.dirname(clientPath), 'HytaleClient_temp.exe');
+
+    await downloadFile(clientUrl, tempClientPath, progressCallback);
+
+    const backupPath = path.join(path.dirname(clientPath), 'HytaleClient_original.exe');
+    if (!fs.existsSync(backupPath)) {
+      fs.copyFileSync(clientPath, backupPath);
+      console.log('Original client backed up');
+    }
+
+    fs.renameSync(tempClientPath, clientPath);
+    
+    if (progressCallback) {
+      progressCallback('Multiplayer installed', 100, null, null, null);
+    }
+    console.log('Multiplayer installed successfully');
+
+    return { success: true, installed: true };
+
+  } catch (error) {
+    console.error('Error installing Multiplayer:', error);
+    throw new Error(`Failed to install Multiplayer: ${error.message}`);
+  }
+}
+
+async function checkAndInstallMultiClient(gameDir, progressCallback) {
+  try {
+    if (process.platform !== 'win32') {
+      console.log('Multiplayer check skipped (Windows only)');
+      return { success: true, skipped: true, reason: 'Windows only' };
+    }
+
+    console.log('Checking for Multiplayer availability...');
+    
+    const [clientVersion, multiVersion] = await Promise.all([
+      getLatestClientVersion(),
+      getMultiClientVersion()
+    ]);
+
+    if (!multiVersion) {
+      console.log('Multiplayer not available');
+      return { success: true, skipped: true, reason: 'Multiplayer not available' };
+    }
+
+    if (clientVersion === multiVersion) {
+      console.log(`Versions match (${clientVersion}), installing Multiplayer...`);
+      return await downloadMultiClient(gameDir, progressCallback);
+    } else {
+      console.log(`Version mismatch: client=${clientVersion}, multi=${multiVersion}`);
+      return { success: true, skipped: true, reason: 'Version mismatch' };
+    }
+
+  } catch (error) {
+    console.error('Error checking Multiplayer:', error);
+    return { success: false, error: error.message };
+  }
+}
+
+module.exports = {
+  downloadMultiClient,
+  checkAndInstallMultiClient
+};
--- a/backend/managers/uiFileManager.js
+++ b/backend/managers/uiFileManager.js
@@ -0,0 +1,116 @@
+const fs = require('fs');
+const path = require('path');
+const { downloadFile, findHomePageUIPath, findLogoPath } = require('../utils/fileManager');
+
+async function downloadAndReplaceHomePageUI(gameDir, progressCallback) {
+  try {
+    console.log('Downloading HomePage.ui from server...');
+    
+    if (progressCallback) {
+      progressCallback('Downloading HomePage.ui...', null, null, null, null);
+    }
+
+    const homeUIUrl = 'http://3.10.208.30:3002/api/HomeUI';
+    const tempHomePath = path.join(path.dirname(gameDir), 'HomePage_temp.ui');
+
+    await downloadFile(homeUIUrl, tempHomePath);
+
+    const existingHomePath = findHomePageUIPath(gameDir);
+    
+    if (existingHomePath && fs.existsSync(existingHomePath)) {
+      console.log('Found existing HomePage.ui at:', existingHomePath);
+      
+      const backupPath = existingHomePath + '.backup';
+      if (!fs.existsSync(backupPath)) {
+        fs.copyFileSync(existingHomePath, backupPath);
+        console.log('Original HomePage.ui backed up');
+      }
+      
+      fs.copyFileSync(tempHomePath, existingHomePath);
+      console.log('HomePage.ui replaced successfully');
+    } else {
+      console.log('No existing HomePage.ui found, skipping replacement');
+    }
+    
+    if (fs.existsSync(tempHomePath)) {
+      fs.unlinkSync(tempHomePath);
+    }
+    
+    if (progressCallback) {
+      progressCallback('HomePage.ui updated', null, null, null, null);
+    }
+    
+    return { success: true, updated: true };
+
+  } catch (error) {
+    console.error('Error downloading/replacing HomePage.ui:', error);
+    
+    const tempHomePath = path.join(path.dirname(gameDir), 'HomePage_temp.ui');
+    if (fs.existsSync(tempHomePath)) {
+      fs.unlinkSync(tempHomePath);
+    }
+    
+    console.log('HomePage.ui update failed, continuing...');
+    return { success: false, error: error.message };
+  }
+}
+
+async function downloadAndReplaceLogo(gameDir, progressCallback) {
+  try {
+    console.log('Downloading Logo@2x.png from server...');
+    
+    if (progressCallback) {
+      progressCallback('Downloading Logo@2x.png...', null, null, null, null);
+    }
+
+    const logoUrl = 'http://3.10.208.30:3002/api/Logo';
+    const tempLogoPath = path.join(path.dirname(gameDir), 'Logo@2x_temp.png');
+
+    await downloadFile(logoUrl, tempLogoPath);
+
+    const existingLogoPath = findLogoPath(gameDir);
+    
+    if (existingLogoPath && fs.existsSync(existingLogoPath)) {
+      console.log('Found existing Logo@2x.png at:', existingLogoPath);
+      
+      const backupPath = existingLogoPath + '.backup';
+      if (!fs.existsSync(backupPath)) {
+        fs.copyFileSync(existingLogoPath, backupPath);
+        console.log('Original Logo@2x.png backed up');
+      }
+      
+      fs.copyFileSync(tempLogoPath, existingLogoPath);
+      console.log('Logo@2x.png replaced successfully');
+    } else {
+      console.log('No existing Logo@2x.png found, skipping replacement');
+    }
+    
+    if (fs.existsSync(tempLogoPath)) {
+      fs.unlinkSync(tempLogoPath);
+    }
+    
+    if (progressCallback) {
+      progressCallback('Logo@2x.png updated', null, null, null, null);
+    }
+    
+    return { success: true, updated: true };
+
+  } catch (error) {
+    console.error('Error downloading/replacing Logo@2x.png:', error);
+    
+    const tempLogoPath = path.join(path.dirname(gameDir), 'Logo@2x_temp.png');
+    if (fs.existsSync(tempLogoPath)) {
+      fs.unlinkSync(tempLogoPath);
+    }
+    
+    console.log('Logo@2x.png update failed, continuing...');
+    return { success: false, error: error.message };
+  }
+}
+
+module.exports = {
+  downloadAndReplaceHomePageUI,
+  findHomePageUIPath,
+  downloadAndReplaceLogo,
+  findLogoPath
+};
--- a/backend/services/firstLaunch.js
+++ b/backend/services/firstLaunch.js
@@ -0,0 +1,105 @@
+const path = require('path');
+const fs = require('fs');
+const { markAsLaunched, loadConfig } = require('../core/config');
+const { checkExistingGameInstallation, updateGameFiles } = require('../managers/gameManager');
+const { getInstalledClientVersion, getLatestClientVersion } = require('./versionManager');
+
+async function proposeGameUpdate(existingGame, progressCallback) {
+  try {
+    console.log('Proposing game update for existing installation...');
+    
+    if (progressCallback) {
+      progressCallback('Checking for game updates...', 0, null, null, null);
+    }
+    
+    const [installedVersion, latestVersion] = await Promise.all([
+      getInstalledClientVersion(),
+      getLatestClientVersion()
+    ]);
+    
+    console.log(`Existing installation - Installed: ${installedVersion}, Latest: ${latestVersion}`);
+    
+    const customAppDir = path.join(existingGame.installPath, 'HytaleF2P');
+    const customCacheDir = path.join(customAppDir, 'cache');
+    const customToolsDir = path.join(customAppDir, 'butler');
+    
+    [customCacheDir, customToolsDir].forEach(dir => {
+      const fs = require('fs');
+      if (!fs.existsSync(dir)) {
+        fs.mkdirSync(dir, { recursive: true });
+      }
+    });
+    
+    if (progressCallback) {
+      progressCallback('Updating existing game installation...', 20, null, null, null);
+    }
+    
+    await updateGameFiles(latestVersion, progressCallback, existingGame.gameDir, customToolsDir, customCacheDir);
+    
+    if (progressCallback) {
+      progressCallback('Game update completed successfully', 100, null, null, null);
+    }
+    
+    console.log('Existing game installation updated successfully');
+    return { success: true, updated: true };
+    
+  } catch (error) {
+    console.error('Error updating existing game:', error);
+    if (progressCallback) {
+      progressCallback(`Update failed: ${error.message}`, -1, null, null, null);
+    }
+    throw error;
+  }
+}
+
+async function handleFirstLaunchCheck(progressCallback) {
+  try {
+    const config = loadConfig();
+    
+    if (config.hasLaunchedBefore === true) {
+      return { isFirstLaunch: false, needsUpdate: false };
+    }
+    
+    console.log('First launch detected, checking for existing game installation...');
+    
+    const existingGame = checkExistingGameInstallation();
+    
+    if (!existingGame) {
+      console.log('No existing game installation found');
+      
+      const hasUserData = config.installPath || config.username || config.javaPath || 
+                          config.chatUsername || config.userUuids || 
+                          Object.keys(config).length > 0;
+      
+      if (hasUserData) {
+        console.log('Detected existing user data but no game, marking as launched');
+        markAsLaunched();
+        return { isFirstLaunch: false, needsUpdate: false };
+      } else {
+        markAsLaunched();
+        return { isFirstLaunch: true, needsUpdate: false, existingGame: null };
+      }
+    }
+    
+    console.log('Existing game installation found:', {
+      gameDir: existingGame.gameDir,
+      hasUserData: existingGame.hasUserData
+    });
+    
+    return { 
+      isFirstLaunch: true, 
+      needsUpdate: true, 
+      existingGame: existingGame 
+    };
+    
+  } catch (error) {
+    console.error('Error in first launch check:', error);
+    markAsLaunched(); 
+    return { isFirstLaunch: true, needsUpdate: false, error: error.message };
+  }
+}
+
+module.exports = {
+  proposeGameUpdate,
+  handleFirstLaunchCheck
+};
--- a/backend/services/newsManager.js
+++ b/backend/services/newsManager.js
@@ -0,0 +1,31 @@
+const axios = require('axios');
+
+async function getHytaleNews() {
+  try {
+    const response = await axios.get('https://launcher.hytale.com/launcher-feed/release/feed.json', {
+      headers: {
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
+      },
+      timeout: 10000
+    });
+    
+    const articles = response.data.articles || [];
+    return articles.map(article => ({
+      title: article.title || '',
+      description: article.description || '',
+      destUrl: article.dest_url || '',
+      imageUrl: article.image_url ? 
+        (article.image_url.startsWith('http') ? 
+          article.image_url : 
+          `https://launcher.hytale.com/launcher-feed/release/${article.image_url}`
+        ) : ''
+    }));
+  } catch (error) {
+    console.error('Failed to fetch news:', error.message);
+    return [];
+  }
+}
+
+module.exports = {
+  getHytaleNews
+};
--- a/backend/services/playerManager.js
+++ b/backend/services/playerManager.js
@@ -0,0 +1,34 @@
+const fs = require('fs');
+const path = require('path');
+const { v4: uuidv4 } = require('uuid');
+const { PLAYER_ID_FILE, APP_DIR } = require('../core/paths');
+
+function getOrCreatePlayerId() {
+  try {
+    if (!fs.existsSync(APP_DIR)) {
+      fs.mkdirSync(APP_DIR, { recursive: true });
+    }
+
+    if (fs.existsSync(PLAYER_ID_FILE)) {
+      const data = JSON.parse(fs.readFileSync(PLAYER_ID_FILE, 'utf8'));
+      if (data.playerId) {
+        return data.playerId;
+      }
+    }
+
+    const newPlayerId = uuidv4();
+    fs.writeFileSync(PLAYER_ID_FILE, JSON.stringify({
+      playerId: newPlayerId,
+      createdAt: new Date().toISOString()
+    }, null, 2));
+
+    return newPlayerId;
+  } catch (error) {
+    console.error('Error managing player ID:', error);
+    return uuidv4();
+  }
+}
+
+module.exports = {
+  getOrCreatePlayerId
+};
--- a/backend/services/versionManager.js
+++ b/backend/services/versionManager.js
@@ -0,0 +1,82 @@
+const axios = require('axios');
+
+async function getLatestClientVersion() {
+  try {
+    console.log('Fetching latest client version from API...');
+    const response = await axios.get('http://3.10.208.30:3002/api/version_client', {
+      timeout: 5000,
+      headers: {
+        'User-Agent': 'Hytale-F2P-Launcher'
+      }
+    });
+
+    if (response.data && response.data.client_version) {
+      const version = response.data.client_version;
+      console.log(`Latest client version: ${version}`);
+      return version;
+    } else {
+      console.log('Warning: Invalid API response, falling back to default version');
+      return '4.pwr';
+    }
+  } catch (error) {
+    console.error('Error fetching client version:', error.message);
+    console.log('Warning: API unavailable, falling back to default version');
+    return '4.pwr';
+  }
+}
+
+async function getInstalledClientVersion() {
+  try {
+    console.log('Fetching installed client version from API...');
+    const response = await axios.get('http://3.10.208.30:3002/api/clientCheck', {
+      timeout: 5000,
+      headers: {
+        'User-Agent': 'Hytale-F2P-Launcher'
+      }
+    });
+
+    if (response.data && response.data.client_version) {
+      const version = response.data.client_version;
+      console.log(`Installed client version: ${version}`);
+      return version;
+    } else {
+      console.log('Warning: Invalid clientCheck API response');
+      return null;
+    }
+  } catch (error) {
+    console.error('Error fetching installed client version:', error.message);
+    console.log('Warning: clientCheck API unavailable');
+    return null;
+  }
+}
+
+async function getMultiClientVersion() {
+  try {
+    console.log('Fetching Multiplayer version from API...');
+    const response = await axios.get('http://3.10.208.30:3002/api/multi', {
+      timeout: 5000,
+      headers: {
+        'User-Agent': 'Hytale-F2P-Launcher'
+      }
+    });
+
+    if (response.data && response.data.multi_version) {
+      const version = response.data.multi_version;
+      console.log(`Multiplayer version: ${version}`);
+      return version;
+    } else {
+      console.log('Warning: Invalid multi API response');
+      return null;
+    }
+  } catch (error) {
+    console.error('Error fetching Multiplayer version:', error.message);
+    console.log('Multiplayer not available');
+    return null;
+  }
+}
+
+module.exports = {
+  getLatestClientVersion,
+  getInstalledClientVersion,
+  getMultiClientVersion
+};
--- a/backend/updateManager.js
+++ b/backend/updateManager.js
@@ -1,7 +1,7 @@
 const axios = require('axios');

 const UPDATE_CHECK_URL = 'http://3.10.208.30:3002/api/version_launcher';
-const CURRENT_VERSION = '2.0.0';
+const CURRENT_VERSION = '2.0.1';
 const GITHUB_DOWNLOAD_URL = 'https://github.com/amiayweb/Hytale-F2P/';

 class UpdateManager {
--- a/backend/utils/clientPatcher.js
+++ b/backend/utils/clientPatcher.js
@@ -0,0 +1,511 @@
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+const AdmZip = require('adm-zip');
+
+// Domain configuration
+const ORIGINAL_DOMAIN = 'hytale.com';
+
+// Get target domain from config or environment
+function getTargetDomain() {
+  // Check environment variable first
+  if (process.env.HYTALE_AUTH_DOMAIN) {
+    return process.env.HYTALE_AUTH_DOMAIN;
+  }
+  // Try to load from config
+  try {
+    const { getAuthDomain } = require('../core/config');
+    return getAuthDomain();
+  } catch (e) {
+    // Config not available, use default
+    return 'sanasol.ws';
+  }
+}
+
+// Default domain - must be exactly 10 characters (same as hytale.com)
+const DEFAULT_NEW_DOMAIN = 'sanasol.ws';
+
+/**
+ * Patches HytaleClient and HytaleServer binaries to replace hytale.com with custom domain
+ * This allows the game to connect to a custom authentication server
+ */
+class ClientPatcher {
+  constructor() {
+    this.patchedFlag = '.patched_custom';
+  }
+
+  /**
+   * Get the target domain for patching
+   */
+  getNewDomain() {
+    const domain = getTargetDomain();
+    // Validate domain length matches original
+    if (domain.length !== ORIGINAL_DOMAIN.length) {
+      console.warn(`Warning: Domain "${domain}" length (${domain.length}) doesn't match original "${ORIGINAL_DOMAIN}" (${ORIGINAL_DOMAIN.length})`);
+      console.warn(`Using default domain: ${DEFAULT_NEW_DOMAIN}`);
+      return DEFAULT_NEW_DOMAIN;
+    }
+    return domain;
+  }
+
+  /**
+   * Convert a string to UTF-16LE bytes (how .NET stores strings)
+   */
+  stringToUtf16LE(str) {
+    const buf = Buffer.alloc(str.length * 2);
+    for (let i = 0; i < str.length; i++) {
+      buf.writeUInt16LE(str.charCodeAt(i), i * 2);
+    }
+    return buf;
+  }
+
+  /**
+   * Convert a string to UTF-8 bytes (how Java stores strings)
+   */
+  stringToUtf8(str) {
+    return Buffer.from(str, 'utf8');
+  }
+
+  /**
+   * Find all occurrences of a pattern in a buffer
+   */
+  findAllOccurrences(buffer, pattern) {
+    const positions = [];
+    let pos = 0;
+    while (pos < buffer.length) {
+      const index = buffer.indexOf(pattern, pos);
+      if (index === -1) break;
+      positions.push(index);
+      pos = index + 1;
+    }
+    return positions;
+  }
+
+  /**
+   * UTF-8 domain replacement for Java JAR files.
+   * Java stores strings in UTF-8 format in the constant pool.
+   */
+  findAndReplaceDomainUtf8(data, oldDomain, newDomain) {
+    let count = 0;
+    const result = Buffer.from(data);
+
+    const oldUtf8 = this.stringToUtf8(oldDomain);
+    const newUtf8 = this.stringToUtf8(newDomain);
+
+    // Find all occurrences of the domain
+    const positions = this.findAllOccurrences(result, oldUtf8);
+
+    for (const pos of positions) {
+      // Replace the domain
+      newUtf8.copy(result, pos);
+      count++;
+      console.log(`  Patched UTF-8 occurrence at offset 0x${pos.toString(16)}`);
+    }
+
+    return { buffer: result, count };
+  }
+
+  /**
+   * Smart domain replacement that handles both null-terminated and non-null-terminated strings.
+   * .NET AOT stores some strings in various formats:
+   * - Standard UTF-16LE (each char is 2 bytes with \x00 high byte)
+   * - Length-prefixed where last char may have metadata byte instead of \x00
+   */
+  findAndReplaceDomainSmart(data, oldDomain, newDomain) {
+    let count = 0;
+    const result = Buffer.from(data);
+
+    // Get UTF-16LE bytes without the last character
+    const oldUtf16NoLast = this.stringToUtf16LE(oldDomain.slice(0, -1));
+    const newUtf16NoLast = this.stringToUtf16LE(newDomain.slice(0, -1));
+    const oldLastChar = this.stringToUtf16LE(oldDomain.slice(-1));
+    const newLastChar = this.stringToUtf16LE(newDomain.slice(-1));
+
+    // ASCII code of last characters
+    const oldLastCharByte = oldDomain.charCodeAt(oldDomain.length - 1);
+    const newLastCharByte = newDomain.charCodeAt(newDomain.length - 1);
+
+    // Find all occurrences of the domain without the last character
+    const positions = this.findAllOccurrences(result, oldUtf16NoLast);
+
+    for (const pos of positions) {
+      // Check if we have the last character following
+      const lastCharPos = pos + oldUtf16NoLast.length;
+      if (lastCharPos + 1 > result.length) continue;
+
+      // Read the byte at last char position
+      const lastCharFirstByte = result[lastCharPos];
+
+      // Check if first byte matches the last character of old domain
+      if (lastCharFirstByte === oldLastCharByte) {
+        // Replace all but last character
+        newUtf16NoLast.copy(result, pos);
+
+        // Replace just the first byte of the last character (preserve metadata byte if any)
+        result[lastCharPos] = newLastCharByte;
+
+        // If there's a proper null byte (standard UTF-16LE), also check/preserve it
+        if (lastCharPos + 1 < result.length) {
+          const secondByte = result[lastCharPos + 1];
+          // Log what type of occurrence this is
+          if (secondByte === 0x00) {
+            console.log(`  Patched UTF-16LE occurrence at offset 0x${pos.toString(16)}`);
+          } else {
+            console.log(`  Patched length-prefixed occurrence at offset 0x${pos.toString(16)} (metadata: 0x${secondByte.toString(16)})`);
+          }
+        }
+        count++;
+      }
+    }
+
+    return { buffer: result, count };
+  }
+
+  /**
+   * Check if the client binary has already been patched
+   */
+  isPatchedAlready(clientPath) {
+    const newDomain = this.getNewDomain();
+    const patchFlagFile = clientPath + this.patchedFlag;
+    if (fs.existsSync(patchFlagFile)) {
+      try {
+        const flagData = JSON.parse(fs.readFileSync(patchFlagFile, 'utf8'));
+        // Check if patched with same target domain
+        if (flagData.targetDomain === newDomain) {
+          return true;
+        }
+      } catch (e) {
+        // Flag file corrupted, will re-patch
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Mark the client as patched
+   */
+  markAsPatched(clientPath) {
+    const newDomain = this.getNewDomain();
+    const patchFlagFile = clientPath + this.patchedFlag;
+    const flagData = {
+      patchedAt: new Date().toISOString(),
+      originalDomain: ORIGINAL_DOMAIN,
+      targetDomain: newDomain,
+      patcherVersion: '1.0.0'
+    };
+    fs.writeFileSync(patchFlagFile, JSON.stringify(flagData, null, 2));
+  }
+
+  /**
+   * Create a backup of the original client binary
+   */
+  backupClient(clientPath) {
+    const backupPath = clientPath + '.original';
+    if (!fs.existsSync(backupPath)) {
+      console.log(`  Creating backup at ${path.basename(backupPath)}`);
+      fs.copyFileSync(clientPath, backupPath);
+      return backupPath;
+    }
+    console.log('  Backup already exists');
+    return backupPath;
+  }
+
+  /**
+   * Restore the original client binary from backup
+   */
+  restoreClient(clientPath) {
+    const backupPath = clientPath + '.original';
+    if (fs.existsSync(backupPath)) {
+      fs.copyFileSync(backupPath, clientPath);
+      const patchFlagFile = clientPath + this.patchedFlag;
+      if (fs.existsSync(patchFlagFile)) {
+        fs.unlinkSync(patchFlagFile);
+      }
+      console.log('Client restored from backup');
+      return true;
+    }
+    console.log('No backup found to restore');
+    return false;
+  }
+
+  /**
+   * Patch the client binary to use the custom domain
+   * @param {string} clientPath - Path to the HytaleClient binary
+   * @param {function} progressCallback - Optional callback for progress updates
+   * @returns {object} Result object with success status and details
+   */
+  async patchClient(clientPath, progressCallback) {
+    const newDomain = this.getNewDomain();
+    console.log('=== Client Patcher ===');
+    console.log(`Target: ${clientPath}`);
+    console.log(`Replacing: ${ORIGINAL_DOMAIN} -> ${newDomain}`);
+
+    // Check if file exists
+    if (!fs.existsSync(clientPath)) {
+      const error = `Client binary not found: ${clientPath}`;
+      console.error(error);
+      return { success: false, error };
+    }
+
+    // Check if already patched
+    if (this.isPatchedAlready(clientPath)) {
+      console.log(`Client already patched for ${newDomain}, skipping`);
+      if (progressCallback) {
+        progressCallback('Client already patched', 100);
+      }
+      return { success: true, alreadyPatched: true, patchCount: 0 };
+    }
+
+    if (progressCallback) {
+      progressCallback('Preparing to patch client...', 10);
+    }
+
+    // Create backup
+    console.log('Creating backup...');
+    this.backupClient(clientPath);
+
+    if (progressCallback) {
+      progressCallback('Reading client binary...', 20);
+    }
+
+    // Read the binary
+    console.log('Reading client binary...');
+    const data = fs.readFileSync(clientPath);
+    console.log(`Binary size: ${(data.length / 1024 / 1024).toFixed(2)} MB`);
+
+    if (progressCallback) {
+      progressCallback('Patching domain references...', 50);
+    }
+
+    // Perform the domain replacement
+    console.log('Patching domain references...');
+    const { buffer: patchedData, count } = this.findAndReplaceDomainSmart(data, ORIGINAL_DOMAIN, newDomain);
+
+    if (count === 0) {
+      console.log('No occurrences of hytale.com found - binary may already be modified or has different format');
+      return { success: true, patchCount: 0, warning: 'No domain occurrences found' };
+    }
+
+    if (progressCallback) {
+      progressCallback('Writing patched binary...', 80);
+    }
+
+    // Write the patched binary
+    console.log('Writing patched binary...');
+    fs.writeFileSync(clientPath, patchedData);
+
+    // Mark as patched
+    this.markAsPatched(clientPath);
+
+    if (progressCallback) {
+      progressCallback('Patching complete', 100);
+    }
+
+    console.log(`Successfully patched ${count} occurrences`);
+    console.log('=== Patching Complete ===');
+
+    return { success: true, patchCount: count };
+  }
+
+  /**
+   * Patch the server JAR to use the custom domain
+   * JAR files are ZIP archives, so we need to extract, patch class files, and repackage
+   * @param {string} serverPath - Path to the HytaleServer.jar
+   * @param {function} progressCallback - Optional callback for progress updates
+   * @returns {object} Result object with success status and details
+   */
+  async patchServer(serverPath, progressCallback) {
+    const newDomain = this.getNewDomain();
+    console.log('=== Server Patcher ===');
+    console.log(`Target: ${serverPath}`);
+    console.log(`Replacing: ${ORIGINAL_DOMAIN} -> ${newDomain}`);
+
+    // Check if file exists
+    if (!fs.existsSync(serverPath)) {
+      const error = `Server JAR not found: ${serverPath}`;
+      console.error(error);
+      return { success: false, error };
+    }
+
+    // Check if already patched
+    if (this.isPatchedAlready(serverPath)) {
+      console.log(`Server already patched for ${newDomain}, skipping`);
+      if (progressCallback) {
+        progressCallback('Server already patched', 100);
+      }
+      return { success: true, alreadyPatched: true, patchCount: 0 };
+    }
+
+    if (progressCallback) {
+      progressCallback('Preparing to patch server...', 10);
+    }
+
+    // Create backup
+    console.log('Creating backup...');
+    this.backupClient(serverPath);
+
+    if (progressCallback) {
+      progressCallback('Extracting server JAR...', 20);
+    }
+
+    // Open the JAR file as a ZIP
+    console.log('Opening server JAR...');
+    const zip = new AdmZip(serverPath);
+    const entries = zip.getEntries();
+    console.log(`JAR contains ${entries.length} entries`);
+
+    if (progressCallback) {
+      progressCallback('Patching class files...', 40);
+    }
+
+    // Patch each entry that might contain domain strings
+    let totalCount = 0;
+    const oldUtf8 = this.stringToUtf8(ORIGINAL_DOMAIN);
+    const newUtf8 = this.stringToUtf8(newDomain);
+
+    for (const entry of entries) {
+      // Only patch class files and certain resource files
+      const name = entry.entryName;
+      if (name.endsWith('.class') || name.endsWith('.properties') ||
+          name.endsWith('.json') || name.endsWith('.xml') || name.endsWith('.yml')) {
+
+        const data = entry.getData();
+
+        // Check if this entry contains the domain
+        if (data.includes(oldUtf8)) {
+          const { buffer: patchedData, count } = this.findAndReplaceDomainUtf8(data, ORIGINAL_DOMAIN, newDomain);
+          if (count > 0) {
+            zip.updateFile(entry.entryName, patchedData);
+            console.log(`  Patched ${count} occurrences in ${name}`);
+            totalCount += count;
+          }
+        }
+      }
+    }
+
+    if (totalCount === 0) {
+      console.log('No occurrences of hytale.com found in server JAR entries');
+      return { success: true, patchCount: 0, warning: 'No domain occurrences found in JAR' };
+    }
+
+    if (progressCallback) {
+      progressCallback('Writing patched JAR...', 80);
+    }
+
+    // Write the patched JAR
+    console.log('Writing patched JAR...');
+    zip.writeZip(serverPath);
+
+    // Mark as patched
+    this.markAsPatched(serverPath);
+
+    if (progressCallback) {
+      progressCallback('Server patching complete', 100);
+    }
+
+    console.log(`Successfully patched ${totalCount} occurrences in server`);
+    console.log('=== Server Patching Complete ===');
+
+    return { success: true, patchCount: totalCount };
+  }
+
+  /**
+   * Find the client binary path based on platform
+   */
+  findClientPath(gameDir) {
+    const candidates = [];
+
+    if (process.platform === 'darwin') {
+      // macOS: Check both app bundle and direct binary
+      candidates.push(path.join(gameDir, 'Client', 'Hytale.app', 'Contents', 'MacOS', 'HytaleClient'));
+      candidates.push(path.join(gameDir, 'Client', 'HytaleClient'));
+    } else if (process.platform === 'win32') {
+      candidates.push(path.join(gameDir, 'Client', 'HytaleClient.exe'));
+    } else {
+      candidates.push(path.join(gameDir, 'Client', 'HytaleClient'));
+    }
+
+    for (const candidate of candidates) {
+      if (fs.existsSync(candidate)) {
+        return candidate;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Find the server JAR path
+   */
+  findServerPath(gameDir) {
+    const candidates = [
+      path.join(gameDir, 'Server', 'HytaleServer.jar'),
+      path.join(gameDir, 'Server', 'server.jar')
+    ];
+
+    for (const candidate of candidates) {
+      if (fs.existsSync(candidate)) {
+        return candidate;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Ensure both client and server are patched before launching
+   * @param {string} gameDir - Path to the game directory
+   * @param {function} progressCallback - Optional callback for progress updates
+   */
+  async ensureClientPatched(gameDir, progressCallback) {
+    const results = {
+      client: null,
+      server: null,
+      success: true
+    };
+
+    // Patch client
+    const clientPath = this.findClientPath(gameDir);
+    if (clientPath) {
+      if (progressCallback) {
+        progressCallback('Patching client binary...', 10);
+      }
+      results.client = await this.patchClient(clientPath, (msg, pct) => {
+        if (progressCallback) {
+          progressCallback(`Client: ${msg}`, pct ? pct / 2 : null);
+        }
+      });
+    } else {
+      console.warn('Could not find HytaleClient binary');
+      results.client = { success: false, error: 'Client binary not found' };
+    }
+
+    // Patch server
+    const serverPath = this.findServerPath(gameDir);
+    if (serverPath) {
+      if (progressCallback) {
+        progressCallback('Patching server JAR...', 50);
+      }
+      results.server = await this.patchServer(serverPath, (msg, pct) => {
+        if (progressCallback) {
+          progressCallback(`Server: ${msg}`, pct ? 50 + pct / 2 : null);
+        }
+      });
+    } else {
+      console.warn('Could not find HytaleServer.jar');
+      results.server = { success: false, error: 'Server JAR not found' };
+    }
+
+    // Calculate overall success
+    results.success = (results.client && results.client.success) || (results.server && results.server.success);
+    results.alreadyPatched = (results.client && results.client.alreadyPatched) && (results.server && results.server.alreadyPatched);
+    results.patchCount = (results.client ? results.client.patchCount || 0 : 0) + (results.server ? results.server.patchCount || 0 : 0);
+
+    if (progressCallback) {
+      progressCallback('Patching complete', 100);
+    }
+
+    return results;
+  }
+}
+
+// Export singleton instance
+module.exports = new ClientPatcher();
--- a/backend/utils/fileManager.js
+++ b/backend/utils/fileManager.js
@@ -0,0 +1,103 @@
+const fs = require('fs');
+const path = require('path');
+const axios = require('axios');
+
+async function downloadFile(url, dest, progressCallback) {
+  const response = await axios({
+    method: 'GET',
+    url: url,
+    responseType: 'stream',
+    headers: {
+      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+      'Accept': '*/*',
+      'Accept-Language': 'en-US,en;q=0.9',
+      'Referer': 'https://launcher.hytale.com/'
+    }
+  });
+
+  const totalSize = parseInt(response.headers['content-length'], 10);
+  let downloaded = 0;
+  const startTime = Date.now();
+
+  const writer = fs.createWriteStream(dest);
+
+  response.data.on('data', (chunk) => {
+    downloaded += chunk.length;
+    if (progressCallback && totalSize > 0) {
+      const percent = Math.min(100, Math.max(0, (downloaded / totalSize) * 100));
+      const elapsed = (Date.now() - startTime) / 1000;
+      const speed = elapsed > 0 ? downloaded / elapsed : 0;
+      progressCallback(null, percent, speed, downloaded, totalSize);
+    }
+  });
+
+  response.data.pipe(writer);
+
+  return new Promise((resolve, reject) => {
+    writer.on('finish', resolve);
+    writer.on('error', reject);
+    response.data.on('error', reject);
+  });
+}
+
+function findHomePageUIPath(gameLatest) {
+  function searchDirectory(dir) {
+    try {
+      const items = fs.readdirSync(dir, { withFileTypes: true });
+      
+      for (const item of items) {
+        if (item.isFile() && item.name === 'HomePage.ui') {
+          return path.join(dir, item.name);
+        } else if (item.isDirectory()) {
+          const found = searchDirectory(path.join(dir, item.name));
+          if (found) {
+            return found;
+          }
+        }
+      }
+    } catch (error) {
+    }
+    
+    return null;
+  }
+  
+  if (!fs.existsSync(gameLatest)) {
+    return null;
+  }
+  
+  return searchDirectory(gameLatest);
+}
+
+function findLogoPath(gameLatest) {
+  function searchDirectory(dir) {
+    try {
+      const items = fs.readdirSync(dir, { withFileTypes: true });
+      
+      for (const item of items) {
+        if (item.isFile() && item.name === 'Logo@2x.png') {
+          return path.join(dir, item.name);
+        } else if (item.isDirectory()) {
+          const found = searchDirectory(path.join(dir, item.name));
+          if (found) {
+            return found;
+          }
+        }
+      }
+    } catch (error) {
+    }
+    
+    return null;
+  }
+  
+  if (!fs.existsSync(gameLatest)) {
+    return null;
+  }
+  
+  return searchDirectory(gameLatest);
+}
+
+module.exports = {
+  downloadFile,
+  findHomePageUIPath,
+  findLogoPath
+};
--- a/backend/utils/platformUtils.js
+++ b/backend/utils/platformUtils.js
@@ -0,0 +1,73 @@
+const { execSync } = require('child_process');
+
+function getOS() {
+  if (process.platform === 'win32') return 'windows';
+  if (process.platform === 'darwin') return 'darwin';
+  if (process.platform === 'linux') return 'linux';
+  return 'unknown';
+}
+
+function getArch() {
+  return process.arch === 'x64' ? 'amd64' : process.arch;
+}
+
+function isWaylandSession() {
+  if (process.platform !== 'linux') {
+    return false;
+  }
+  
+  const sessionType = process.env.XDG_SESSION_TYPE;
+  if (sessionType && sessionType.toLowerCase() === 'wayland') {
+    return true;
+  }
+  
+  if (process.env.WAYLAND_DISPLAY) {
+    return true;
+  }
+  
+  try {
+    const sessionId = process.env.XDG_SESSION_ID;
+    if (sessionId) {
+      const output = execSync(`loginctl show-session ${sessionId} -p Type`, { encoding: 'utf8' });
+      if (output && output.toLowerCase().includes('wayland')) {
+        return true;
+      }
+    }
+  } catch (err) {
+  }
+  
+  return false;
+}
+
+function setupWaylandEnvironment() {
+  if (process.platform !== 'linux') {
+    return {};
+  }
+  
+  if (!isWaylandSession()) {
+    console.log('Detected X11 session, using default environment');
+    return {};
+  }
+  
+  console.log('Detected Wayland session, configuring environment...');
+  
+  const envVars = {
+    SDL_VIDEODRIVER: 'wayland',
+    GDK_BACKEND: 'wayland',
+    QT_QPA_PLATFORM: 'wayland',
+    MOZ_ENABLE_WAYLAND: '1',
+    _JAVA_AWT_WM_NONREPARENTING: '1'
+  };
+  
+  envVars.ELECTRON_OZONE_PLATFORM_HINT = 'wayland';
+  
+  console.log('Wayland environment variables:', envVars);
+  return envVars;
+}
+
+module.exports = {
+  getOS,
+  getArch,
+  isWaylandSession,
+  setupWaylandEnvironment
+};
--- a/main.js
+++ b/main.js
@@ -3,6 +3,9 @@ const path = require('path');
 const fs = require('fs');
 const { launchGame, launchGameWithVersionCheck, installGame, saveUsername, loadUsername, saveChatUsername, loadChatUsername, saveJavaPath, loadJavaPath, saveInstallPath, loadInstallPath, isGameInstalled, uninstallGame, getHytaleNews, handleFirstLaunchCheck, proposeGameUpdate, markAsLaunched } = require('./backend/launcher');
 const UpdateManager = require('./backend/updateManager');
+const logger = require('./backend/logger');
+
+logger.interceptConsole();

 let mainWindow;
 let updateManager;
@@ -66,7 +69,7 @@ function createWindow() {
      preload: path.join(__dirname, 'preload.js'),
      nodeIntegration: false,
      contextIsolation: true,
-      devTools: false,
+      devTools: true,
      webSecurity: true
    }
  });
@@ -116,9 +119,30 @@ function createWindow() {
 }

 app.whenReady().then(async () => {
+  console.log('=== HYTALE F2P LAUNCHER STARTED ===');
+  console.log('Platform:', process.platform);
+  console.log('Architecture:', process.arch);
+  console.log('Electron version:', process.versions.electron);
+  console.log('Node.js version:', process.versions.node);
+  console.log('Log directory:', logger.getLogDirectory());
+  
  createWindow();
  
  setTimeout(async () => {
+    let timeoutReached = false;
+    
+    const unlockPlayButton = () => {
+      if (mainWindow && !mainWindow.isDestroyed()) {
+        mainWindow.webContents.send('lock-play-button', false);
+      }
+    };
+    
+    const timeoutId = setTimeout(() => {
+      timeoutReached = true;
+      console.warn('First launch check timeout reached, unlocking play button');
+      unlockPlayButton();
+    }, 15000);
+    
    try {
      console.log('Starting first launch check...');
      
@@ -132,7 +156,19 @@ app.whenReady().then(async () => {
        }
      };

-      const firstLaunchResult = await handleFirstLaunchCheck(progressCallback);
+      const firstLaunchResult = await Promise.race([
+        handleFirstLaunchCheck(progressCallback),
+        new Promise((_, reject) => {
+          setTimeout(() => reject(new Error('First launch check timeout')), 12000);
+        })
+      ]);
+      
+      clearTimeout(timeoutId);
+      
+      if (timeoutReached) {
+        console.log('Timeout already reached, skipping result processing');
+        return;
+      }
      
      console.log('First launch check result:', firstLaunchResult);
      
@@ -141,32 +177,39 @@ app.whenReady().then(async () => {
          console.log('Sending show-first-launch-update event...');
          
          setTimeout(() => {
-            mainWindow.webContents.send('show-first-launch-update', {
-              existingGame: firstLaunchResult.existingGame,
-              isFirstLaunch: firstLaunchResult.isFirstLaunch
-            });
+            if (mainWindow && !mainWindow.isDestroyed()) {
+              mainWindow.webContents.send('show-first-launch-update', {
+                existingGame: firstLaunchResult.existingGame,
+                isFirstLaunch: firstLaunchResult.isFirstLaunch
+              });
+            }
          }, 1000);
          
        } else if (firstLaunchResult.isFirstLaunch && !firstLaunchResult.existingGame) {
          console.log('Sending show-first-launch-welcome event...');
          
          setTimeout(() => {
-            mainWindow.webContents.send('show-first-launch-welcome');
+            if (mainWindow && !mainWindow.isDestroyed()) {
+              mainWindow.webContents.send('show-first-launch-welcome');
+            }
          }, 1000);
        } else {
-          mainWindow.webContents.send('lock-play-button', false);
+          unlockPlayButton();
        }
      }
    } catch (error) {
+      clearTimeout(timeoutId);
      console.error('Error during first launch check:', error);
-      if (mainWindow && !mainWindow.isDestroyed()) {
-        mainWindow.webContents.send('lock-play-button', false);
+      if (!timeoutReached) {
+        unlockPlayButton();
      }
    }
  }, 3000);
 });

 app.on('window-all-closed', () => {
+  console.log('=== LAUNCHER CLOSING ===');
+  
  // Clean up Discord RPC connection
  if (discordRPC) {
    try {
@@ -198,6 +241,12 @@ ipcMain.handle('launch-game', async (event, playerName, javaPath, installPath) =

    const result = await launchGameWithVersionCheck(playerName, progressCallback, javaPath, installPath);
    
+    if (mainWindow && !mainWindow.isDestroyed()) {
+      setTimeout(() => {
+        mainWindow.webContents.send('progress-complete');
+      }, 2000);
+    }
+    
    return result;
  } catch (error) {
    console.error('Launch error:', error);
@@ -223,6 +272,12 @@ ipcMain.handle('install-game', async (event, playerName, javaPath, installPath)

    const result = await installGame(playerName, progressCallback, javaPath, installPath);
    
+    if (mainWindow && !mainWindow.isDestroyed()) {
+      setTimeout(() => {
+        mainWindow.webContents.send('progress-complete');
+      }, 1000);
+    }
+    
    return result;
  } catch (error) {
    console.error('Install error:', error);
@@ -257,6 +312,7 @@ ipcMain.handle('load-java-path', () => {

 ipcMain.handle('save-install-path', (event, installPath) => {
  saveInstallPath(installPath);
+  logger.updateInstallPath();
  return { success: true };
 });

@@ -311,8 +367,16 @@ ipcMain.handle('mark-as-launched', async () => {
  }
 });

-ipcMain.handle('is-game-installed', () => {
-  return isGameInstalled();
+ipcMain.handle('is-game-installed', async () => {
+  try {
+    return await Promise.race([
+      Promise.resolve(isGameInstalled()),
+      new Promise((resolve) => setTimeout(() => resolve(false), 5000))
+    ]);
+  } catch (error) {
+    console.error('Error checking game installation:', error);
+    return false;
+  }
 });

 ipcMain.handle('uninstall-game', async () => {
@@ -345,6 +409,23 @@ ipcMain.handle('open-external', async (event, url) => {
  }
 });

+ipcMain.handle('open-game-location', async () => {
+  try {
+    const { getResolvedAppDir } = require('./backend/launcher');
+    const gameDir = path.join(getResolvedAppDir(), 'release', 'package', 'game');
+    
+    if (fs.existsSync(gameDir)) {
+      await shell.openPath(gameDir);
+      return { success: true };
+    } else {
+      throw new Error('Game directory not found');
+    }
+  } catch (error) {
+    console.error('Failed to open game location:', error);
+    return { success: false, error: error.message };
+  }
+});
+
 ipcMain.handle('browse-java-path', async () => {
  const isWindows = process.platform === 'win32';
  const isMac = process.platform === 'darwin';
@@ -392,7 +473,10 @@ ipcMain.handle('save-settings', async (event, settings) => {
  try {
    if (settings.playerName) saveUsername(settings.playerName);
    if (settings.javaPath !== undefined) saveJavaPath(settings.javaPath);
-    if (settings.installPath !== undefined) saveInstallPath(settings.installPath);
+    if (settings.installPath !== undefined) {
+      saveInstallPath(settings.installPath);
+      logger.updateInstallPath();
+    }
    return { success: true };
  } catch (error) {
    console.error('Save settings error:', error);
@@ -564,3 +648,34 @@ ipcMain.handle('window-minimize', () => {
  }
 });

+ipcMain.handle('get-log-directory', () => {
+  return logger.getLogDirectory();
+});
+
+ipcMain.handle('get-recent-logs', async (event, maxLines = 100) => {
+  try {
+    const logDir = logger.getLogDirectory();
+    if (!logDir) return null;
+    
+    // Find the most recent log file
+    const files = fs.readdirSync(logDir)
+      .filter(file => file.startsWith('launcher-') && file.endsWith('.log'))
+      .map(file => ({
+        name: file,
+        path: path.join(logDir, file),
+        mtime: fs.statSync(path.join(logDir, file)).mtime
+      }))
+      .sort((a, b) => b.mtime - a.mtime);
+    
+    if (files.length === 0) return null;
+    
+    const latestLogFile = files[0].path;
+    const content = fs.readFileSync(latestLogFile, 'utf8');
+    const lines = content.split('\n');
+    
+    return lines.slice(-maxLines).join('\n');
+  } catch (error) {
+    console.error('Error reading logs:', error);
+    return null;
+  }
+});
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "hytale-f2p-launcher",
-  "version": "2.0.0",
+  "version": "2.0.1",
  "description": "A modern, cross-platform launcher for Hytale with automatic updates and multi-client support",
  "homepage": "https://github.com/amiayweb/Hytale-F2P",
  "main": "main.js",
@@ -37,7 +37,7 @@
    "adm-zip": "^0.5.10",
    "axios": "^1.6.0",
    "discord-rpc": "^4.0.1",
-    "tar": "6.2.1",
+    "tar": "^6.2.1",
    "uuid": "^9.0.1"
  },
  "overrides": {
@@ -97,7 +97,8 @@
        {
          "target": "dmg",
          "arch": [
-            "universal"
+            "x64",
+            "arm64"
          ]
        },
        {
@@ -119,3 +120,5 @@
  }
 }

+
+
--- a/preload.js
+++ b/preload.js
@@ -20,6 +20,7 @@ contextBridge.exposeInMainWorld('electronAPI', {
  getHytaleNews: () => ipcRenderer.invoke('get-hytale-news'),
  openExternal: (url) => ipcRenderer.invoke('open-external', url),
  openExternalLink: (url) => ipcRenderer.invoke('openExternalLink', url),
+  openGameLocation: () => ipcRenderer.invoke('open-game-location'),
  saveSettings: (settings) => ipcRenderer.invoke('save-settings', settings),
  loadSettings: () => ipcRenderer.invoke('load-settings'),
  getLocalAppData: () => ipcRenderer.invoke('get-local-app-data'),
@@ -33,6 +34,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
  onProgressUpdate: (callback) => {
    ipcRenderer.on('progress-update', (event, data) => callback(data));
  },
+  onProgressComplete: (callback) => {
+    ipcRenderer.on('progress-complete', () => callback());
+  },
  getUserId: () => ipcRenderer.invoke('get-user-id'),
  checkForUpdates: () => ipcRenderer.invoke('check-for-updates'),
  openDownloadPage: () => ipcRenderer.invoke('open-download-page'),
@@ -54,5 +58,8 @@ contextBridge.exposeInMainWorld('electronAPI', {
  },
  onLockPlayButton: (callback) => {
    ipcRenderer.on('lock-play-button', (event, locked) => callback(locked));
-  }
+  },
+
+  getLogDirectory: () => ipcRenderer.invoke('get-log-directory'),
+  getRecentLogs: (maxLines) => ipcRenderer.invoke('get-recent-logs', maxLines)
 });
Author	SHA1	Message	Date
sanasol	b6041c1908	Add client and server patching functionality to support custom authentication domain and token system	2026-01-19 16:03:12 +01:00
sanasol	7b6c07283a	Merge branch 'refs/heads/main' into test-mac	2026-01-19 15:11:19 +01:00
AMIAY	300616ba82	Update SERVER.md	2026-01-19 01:55:33 +01:00
sanasol	115e76e461	Update macOS build target architectures to include x64 and arm64	2026-01-19 01:44:11 +01:00
AMIAY	9fdd6f1f44	Update BUILD.md	2026-01-19 00:26:32 +01:00
AMIAY	f0b2342c71	Merge pull request #47 from GreenKod/refactor-split-file refactor: split main file into smaller modules for better maintainabi…	2026-01-18 21:06:09 +01:00
greenkod	7dbc900338	refactor: split main file into smaller modules for better maintainability	2026-01-18 21:29:37 +03:00
AMIAY	bc31f58c9c	Update print statement from 'Hello' to 'Goodbye'	2026-01-18 16:07:31 +01:00
AMIAY	7e5a1577a3	Update and rename styles.css to style.css	2026-01-18 16:07:19 +01:00
AMIAY	84f0c0ba71	Delete GUI/style.css	2026-01-18 16:07:10 +01:00
AMIAY	7ede6c2f27	Add files via upload	2026-01-18 15:42:24 +01:00
AMIAY	be1a24a992	Add files via upload	2026-01-18 15:42:23 +01:00
AMIAY	9a751958b0	Add files via upload	2026-01-18 15:42:22 +01:00
AMIAY	9fcf603e08	Add files via upload	2026-01-18 15:42:20 +01:00
AMIAY	4bc1661587	Update package.json with new configuration	2026-01-18 14:41:51 +01:00
AMIAY	512a53aee7	Enhance README with additional resources and links Updated instructions to include links to Releases and SERVER.md.	2026-01-18 14:41:22 +01:00
AMIAY	cabb5a57d2	Add Hytale F2P Server Setup Guide Added a comprehensive setup guide for the Hytale F2P server, including server file setup, network configuration with Radmin VPN, RAM allocation recommendations, and tips for optimal performance.	2026-01-18 14:40:21 +01:00