Added except to prevent MAC issues

ui/main_window.py

@@ -21,6 +21,8 @@ try:
     ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(app_id)
 except ImportError:
     ctypes = None  # Very unimportant fix, continue if ctypes was not found
+except AttributeError:
+    ctypes = None  # On MAC the package might exist but not the feature
 
 
 class MainWindow(QMainWindow):