Corrupted fla files in adobe animate

Just yesterday when I tried to open the fla files for my HSC majorwork animation it came up with "error in opening file". I looked into this a bunch on different forums and tried to repair them with winRAR by converting them to a RAR file, but the error message "found corrupted header" appeared and the same thing happened when reopening the files after converting them back to fla. I've tried a number of other solutions like converting the files to a ZIP and using diskinternals ZIP repair them but it still didn't work. I also tried updating animate and media encoder and turning my computer on and off again. I tried using EaseUS but that costs money to save the files so I haven't yet. One of the files that was corrupted was a recovery file, and the latest version of the animation I have is from a few months ago meaning I would lose months worth of progress. I'm desperate to try and fix this, as my major work is due only 3 weeks away and I still have a lot more to do with it. Is there any possible way anyone could help me or give advice? I'll provide one of the files below.