Error while opening a project in Animate

This has been happening and I don't know why, I've lost a lot of progress because of it. It basically tells me it had an error opening and and thats it, I've tried using the WinRAR method to fix it, and it didn't work. I've tried reinstalling Animate CC (But I checked "Keep Preferences") and it didn't work. Does anyone have a good solution or has anyone experienced this? Thanks!