I have hundreds of hours invested into a film on movie maker, and today it all of a sudden crashed. When I went to re open it, the following message appeared:

Sorry, Movie Maker can't open this project file. The file might not be compatible with Movie Maker or be corrupted. Please select a different project file.

When I went to OneDrive to share it with Microsoft who can fix corrupted files, it said the file could not be shared. I feel hopeless. Please help.