I worked on a movie maker file for several days, and today when I tried to do final edits the file simply wouldn't open: Movie Maker claims the file is corrupted. Is there any way to fix this issue?

Link: https://onedrive.live.com/redir?resid=64B09E95C98C9B19!106&authkey=!AGlzA-mKafk1XB0&ithint=file%2cwlmp

Any help will be MASSIVELY appreciated.