feat: use Windows Registry for standard install path + cross-platform builds

- Now reads PublicUsersDataParentFolder from Registry:
  HKLM\SOFTWARE\WOW6432Node\MindArk\Entropia Universe
- Constructs full path: {ParentFolder}\public_users_data\cache\icon
- Fallback to hardcoded path if Registry read fails
- Removed unused webbrowser import
- Updated GitHub Actions to build for both Windows and Linux
- Updated README with cross-platform documentation

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build Windows Executable
+name: Build Executables
 
 on:
   push:
@@ -8,7 +8,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  build:
+  build-windows:
     runs-on: windows-latest
     
     steps:
@@ -44,3 +44,45 @@ jobs:
         prerelease: false
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  build-linux:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v3
+    
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.11'
+    
+    - name: Install system dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libgl1-mesa-glx libglib2.0-0 libxkbcommon-x11-0
+    
+    - name: Install Python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pyinstaller
+        pip install -r requirements.txt
+    
+    - name: Build executable
+      run: |
+        pyinstaller icon_extractor.spec --clean
+    
+    - name: Upload artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: EU-Icon-Extractor-Linux
+        path: dist/EU-Icon-Extractor
+    
+    - name: Create Release
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+      uses: softprops/action-gh-release@v1
+      with:
+        files: dist/EU-Icon-Extractor
+        draft: false
+        prerelease: false
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,6 +1,6 @@
 # Entropia Universe Icon Extractor
 
-A standalone tool for extracting item icons from Entropia Universe game cache.
+A standalone cross-platform tool for extracting item icons from Entropia Universe game cache.
 
 <img src="icon.ico" width="64" height="64" alt="EU Icon Extractor">
 
@@ -8,7 +8,10 @@ A standalone tool for extracting item icons from Entropia Universe game cache.
 
 **[Download Latest Release](https://github.com/ImpulsiveFPS/EU-Icon-Extractor/releases/latest)**
 
-Download `EU-Icon-Extractor.exe` and run it - no installation needed!
+- **Windows:** `EU-Icon-Extractor-Windows.exe`
+- **Linux:** `EU-Icon-Extractor-Linux`
+
+No installation needed - just download and run!
 
 ## Description
 
@@ -16,10 +19,34 @@ Extract item icons from Entropia Universe cache and convert them to PNG format.
 
 **Important:** Items must be seen/rendered in-game before they appear in the cache! If an icon is missing, view the item in your inventory or the auction first.
 
+## Features
+
+### Cross-Platform Support
+- **Windows** - Auto-detects from Registry and standard paths
+- **Linux** - Auto-detects Steam installations
+
+### Multiple Cache Sources
+- **Standard Install** - Detected from Windows Registry (`PublicUsersDataParentFolder`)
+- **Steam** - Auto-detects from Steam library folders
+- **Manual Browse** - Select custom cache folder
+- **Extract from All** - Combine icons from multiple sources
+
+### Extraction Options
+- **Version selector** - Choose which game version to extract from
+- **"All Folders" option** - Extract from all versions at once
+- **320x320 PNG output** - Icons centered on transparent canvas
+- **Multiple upscale methods** - HQ4x, Lanczos, or Nearest Neighbor
+
+### User Interface
+- **Source selection** - Choose between Standard, Steam, or All sources
+- **Double-click preview** - Preview TGA files before extraction
+- **Light/Dark theme** - Toggle between themes
+- **Custom output folder** - Choose where to save extracted icons
+
 ## Usage
 
 ### Option 1: Download Executable (Recommended)
-1. Download `EU-Icon-Extractor.exe` from [Releases](https://github.com/ImpulsiveFPS/EU-Icon-Extractor/releases/latest)
+1. Download the appropriate executable for your OS from [Releases](https://github.com/ImpulsiveFPS/EU-Icon-Extractor/releases/latest)
 2. Double-click to run - no installation needed!
 
 ### Option 2: Run from Source
@@ -32,23 +59,39 @@ python icon_extractor.py
 - PyQt6: `pip install PyQt6`
 - Pillow: `pip install Pillow`
 
-## Features
+## Cache Locations
 
-- **Auto-detects** game cache from `C:\ProgramData\Entropia Universe\public_users_data\cache\icon`
+### Windows
-- **Version selector** - Choose which game version to extract from
+The tool automatically detects the cache location from the Windows Registry:
-- **"All Folders" option** - Extract from all versions at once
+```
-- **Double-click preview** - Preview TGA files before extraction
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\MindArk\Entropia Universe
-- **320x320 PNG output** - Icons centered on transparent canvas
+PublicUsersDataParentFolder = C:\ProgramData\Entropia Universe
-- **Light/Dark theme** - Toggle between themes
+```
-- **Custom output folder** - Choose where to save extracted icons
+
+Full cache path: `{PublicUsersDataParentFolder}\public_users_data\cache\icon\{VERSION}`
+
+### Linux (Steam)
+The tool checks these Steam installation paths:
+- `~/.steam/steam/`
+- `~/.local/share/Steam/`
+- `~/.steam/root/`
+
+Full cache path: `{Steam}/steamapps/common/Entropia Universe/public_users_data/cache/icon/{VERSION}`
 
 ## Output
 
 Icons are saved to your Documents folder:
+
+**Windows:**
 ```
 Documents\Entropia Universe\Icons\
 ```
 
+**Linux:**
+```
+~/Documents/Entropia Universe/Icons/
+```
+
 (Same location where `chat.log` is normally stored)
 
 ## Links
@@ -56,6 +99,7 @@ Documents\Entropia Universe\Icons\
 - **Developer:** ImpulsiveFPS
 - **Discord:** impulsivefps
 - **GitHub:** https://github.com/ImpulsiveFPS/EU-Icon-Extractor
+- **Report Bug:** https://github.com/ImpulsiveFPS/EU-Icon-Extractor/issues
 - **Support Me:** https://ko-fi.com/impulsivefps
 
 ## Disclaimer
@@ -64,8 +108,7 @@ Entropia Universe Icon Extractor is a fan-made resource and is not affiliated wi
 
 ## Building from Source
 
-If you want to build the executable yourself:
+### Windows
-
 ```bash
 # Install dependencies
 pip install pyinstaller
@@ -75,7 +118,20 @@ pip install -r requirements.txt
 pyinstaller icon_extractor.spec --clean
 ```
 
-The executable will be in `dist/EU-Icon-Extractor.exe`
+### Linux
+```bash
+# Install system dependencies (Ubuntu/Debian)
+sudo apt-get install libgl1-mesa-glx libglib2.0-0 libxkbcommon-x11-0
+
+# Install Python dependencies
+pip install pyinstaller
+pip install -r requirements.txt
+
+# Build executable
+pyinstaller icon_extractor.spec --clean
+```
+
+The executable will be in `dist/`
 
 ## License
 

icon_extractor.py

@@ -13,10 +13,9 @@ GitHub: https://github.com/ImpulsiveFPS/EU-Icon-Extractor
 import sys
 import os
 import subprocess
-import webbrowser
 import re
 from pathlib import Path
-from typing import Optional, List
+from typing import Optional, List, Tuple
 
 # Platform-specific imports
 if sys.platform == 'win32':
@@ -102,19 +101,32 @@ def parse_library_folders_vdf(vdf_path: Path) -> List[Path]:
     return libraries
 
 
-def find_all_cache_paths() -> List[Path]:
+def find_all_cache_paths() -> List[Tuple[str, Path]]:
     """
     Find all Entropia Universe cache folders.
-    Returns a list of paths (standard install, Steam, etc.)
+    Returns a list of (name, path) tuples.
     """
     found_paths = []
     
-    # Check standard installation first (platform-specific)
+    # Check Windows Registry for MindArk installation (Standard Install)
     if sys.platform == 'win32':
-        standard_path = Path("C:/ProgramData/Entropia Universe/public_users_data/cache/icon")
+        try:
-    else:
+            with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\WOW6432Node\MindArk\Entropia Universe") as key:
-        standard_path = Path.home() / ".local" / "share" / "Entropia Universe" / "public_users_data" / "cache" / "icon"
+                parent_folder, _ = winreg.QueryValueEx(key, "PublicUsersDataParentFolder")
+                standard_path = Path(parent_folder) / "public_users_data" / "cache" / "icon"
+                if standard_path.exists() and list(standard_path.rglob("*.tga")):
+                    found_paths.append(("Standard Install", standard_path))
+        except Exception:
+            pass
         
+        # Fallback to hardcoded path if registry fails
+        if not found_paths:
+            fallback_path = Path("C:/ProgramData/Entropia Universe/public_users_data/cache/icon")
+            if fallback_path.exists() and list(fallback_path.rglob("*.tga")):
+                found_paths.append(("Standard Install", fallback_path))
+    else:
+        # Linux standard paths (if non-Steam install exists)
+        standard_path = Path.home() / ".local" / "share" / "Entropia Universe" / "public_users_data" / "cache" / "icon"
         if standard_path.exists() and list(standard_path.rglob("*.tga")):
             found_paths.append(("Standard Install", standard_path))