Thanks again, Hobo.

I do still have the 4.8.1. installer. I'll uninstall 4.9.33 and reinstall 4.8.1. Do you think I should also do that trick with deleting the preferences file?

And yes, no kidding I need an upgrade! However, I believe I can free up a lot of space on my C: drive by moving all my photo albums to the D: drive, there's still over 100GB of space on that. I think I'll get perhaps a gig and a half that way. Thanks for pointing out that the lack of space would hurt Windows performance, I didn't think it needed 450MB! But I've noticed in the last year that practically everything on my machine has been slowing down, so that's probably it. Have you any other suggestions?