Serious Score Corruption(I Guess)

First off, I'm using Musescore 2.0.2, revision f51dc11 on Windows 10.
Now that that's out of the way, what's concerning me is that a full orchestra I was working on just up and corrupted itself mid composition. I wouldn't be as concerned with this as I am if I hadn't been working on the score for roughly 5 days, and had I not be on the 5th to last part(out of 22 parts). Allow me to explain the steps. I was working on the part, adding notes, back tracking and adding extra accents, dynamics, etc. I quite literally only click the left mouse button to select a note. An error message appears. The kind where it tells you something's wrong and tells you to close the application and go get help. I had saved maybe 5 minutes earlier(I save frequently, nearly every section), so I didn't care. One of the windows where it checks for what went wrong that you can cancel out of appeared and I exited out. Musescore closed. I reopen it, and attempt to open the file I was working on. Another error message appears and reads,"Cannot read file..." I close and reopen Musescore and the file. Same error message. Other scores open with no problems. Just the one I've allotted the most time into. I fear for the worst. I think I found the backup; however, the same error message displays when I try to open that as well. Any and all help is appreciated. Thank you in advanced.