UR24C Ableton live 10 does not save project with Basic FX Suite ver. 1.5!

Ableton live 10 in Win 10 Pro, does not save project with Basic FX Suite! Help!!!
Shows when closing a project: “C:\Users\Slava\AppData\Roaming\Ableton\Live 10.1.30\Preferences\Undo” cannot be deleted.
No plugins Basic FX Suite, works well!
Support Ableton Live - doesn’t know!