corrupted file

My file has a lot of problems that I'm trying to remove by rewriting my score. I was halfway through when Musescore closed, and then impossible to reopen my file, the message that appears is that my file is severely corrupted and cannot be opened.
I'd like at least to be able to recover what I've already corrected (i.e. a good half of the score). Do you have a solution for either successfully opening it in musescore, or converting it to pdf?

Thank you very much.