PLEASE HELP! Can't Open Storyline 360 file

I can't open my Storyline project,  I'm getting the "This project is invalid or corrupt and cannot be opened. It may have been created in an earlier version of Storyline".

I already tried searching the file in %appdata%\Articulate\Storyline but it doesn't appear.

I tried importing slides from my project, but it says that the file is being used by another process.

I don't know what else to do.  Please HEEEELP!!! :(

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