I tried downloading the latest version from the launcher before I asked for help, but I didn't think to try it on the web browser. Thank you for this suggestion! It worked, and I'm pretty sure I have all my inventory stuff back. My play session the other day didn't save for some reason, but I didn't do very much anyways, so I can just redo it. I'll let you know if anything else weird happens, but I think it's fine now that it's not the old version anymore. The launcher wouldn't let me download 1.9 because I got it from a bundle and didn't register it as bought I think, but the web browser worked fine.