Lost musescore file

Earlier today I spent several hours working on a score. I manually saved the score and came back a half hour later to keep working on it. It opened with nothing that I had written that day, and upon looking at the file details, I found the save date to be yesterday, even though I had manually saved the score - to two different places. I checked the second file, which I had placed on another one of my computers through a home network. Again, it was the version that I saved the day before... Weird, because I only saved the most recent file to the second computer. I also checked the musescore autosave file, and again, the version I saved the day before.

I'm running on a 2016 windows 10 computer. This happened recently after a dreaded windows 10 update, and I've been using musescore for less than a week (switching from finale).