* Added "Recheck for connected device feature" * WIP on progress bar

working for larger transfers * More generated debug files that I will
  probably use to help create tests

src/main.py

@@ -6,10 +6,31 @@ Simple entry point to launch the Android file transfer application.
 
 try:
     # Try relative import first (when used as module)
-    from .gui import main
+    from .gui.main_window import main
 except ImportError:
     # Fall back to direct import (when run directly)
-    from gui import main
+    try:
+        from gui.main_window import main
+    except ImportError:
+        from gui import AndroidFileHandlerGUI
+        import sys
+
+        def main():
+            """Main function to run the application."""
+            if sys.platform not in ["win32", "linux"]:
+                import tkinter as tk
+                from tkinter import messagebox
+
+                root = tk.Tk()
+                root.withdraw()
+                messagebox.showerror(
+                    "Unsupported OS", "This application only supports Windows or Linux."
+                )
+                sys.exit(1)
+
+            app = AndroidFileHandlerGUI()
+            app.mainloop()
+
 
 if __name__ == "__main__":
     main()