I have been having problems with my PSP files. For some reason, Windows 11 did not show PSP as an app. I have to remove PSP and reinstall it which took me quite a while to figure it out.
Fortunately, I had saved my workspace. However my file locations had to be redirected. It has been a lot of work, but the good that came out of it is that I now can clean up some of the unwanted brushes, preset shapes, etc.