I have the same problem.
The pc of a friend is hanging after starting the cleaning.
On my own pc (W10, v. 1909) everything is working well.
Uninstalling and reinstalling gave the same result.
The old Powertools have been used 2 times and were working fine.
This program has been removed before installing the new version.
It's a new pc with until now only Word, Excel and Thunderbird installed.
If you have any idea, thanks for your suggestions.