After installing / deleting MOS (from Caldis), Magic Mouse does not have any Mouse gestures anymore, does not scroll

Hi there,

• I installed MOS to have a Microsoft surface ARC mouse working better on an M1 Mac. It did not really. So I decided to invest into a Magic Mouse.
• Got a brand new Magic Mouse. Connected to Mac M1 Mini.

• But all mouse gestures are not working as listed here: Use Multi-Touch gestures on your Mac - Apple Support.
• Even System Preferences, Mouse Menu does not show any settings for mouse gestures.
• 
• I uninstalled MOS via AppCleaner (2 files where removed, MOS and some .plist files somewhere in User directory.
• Did restart Mac, no change.
• (Of course I did 'Forget Device')
• Magic Mouse still supports no Multi-Touch gestures and NO SCROLLING at all
• When connecting, Mac shows an unusual Mouse connected notification (not Magic Mouse) - definitely different from the expected Magic Mouse connected notification.
• 

Any Idea? I'm lost!

Thanks in advance, Thomas

[Edited by Moderator]