Several websites seem to offer older versions. Here is one example:
https://www.filehorse.com/download-startallback/old-versions/
You'll see others if you use Google. I haven't tried any of them though, so can't guide you further.
For me, several obvious bugs in 3.8.1 seems to be fixed in 3.8.2, but I don't use many features. Mainly, I use it to fix the humongous taskbar in win 11 that takes up a huge chunk of the screen, if even a small amount of scale factor is used.
Good luck, and hope this helps.