I moved around some of my blender files by putting them in a new folder ("failed tests") and now blender seems unable to navigate to any new files in the initial open file screen. I can open a file it has on the recent files list, but when I go to "open.." to navigate to another file, the file browser that opens up there won't let me click on any files other than whatever file I've opened last. If I go into the place where I can write the file path I can tell it to get to a specific file, but even then it's having problems with those files: it won't select anything in object mode. Any ideas what on earth is happening? I reinstalled Blender but the same thing is going on...
There is a file called recent-files.txt that is saved where the config files are. If you edit that with the new paths you should be fine.
For the location of the file refer to this post:
Problem solved. I'm on a mac. First I followed these instructions to show the hidden files on my hard drive: in Finder, open up your Macintosh HD folder. Press Command+Shift+Dot. Your hidden files will become visible. After that I went to my hard drive, then users/(my username)/ Library/ Application Support/ Blender/ 2.82/ config/ and then I dragged the preferences file to the trash and emptied it. I restarted Blender after that and everything works fine now.