This project is invalid or corrupt......

Hi everyone,

Today when trying to resize a video in my (almost completed) .story file, and articulate crashed. Unfortunately, when I reopened, I encountered the dreaded "this project is invalid or corrupt." I was able to restore a version from a week ago via the recovery feature Ashely mentioned above, but I seem to have lost 50 or so slides worth of animations and interactions (which for me is a ton of work!). I've tried restarting, restoring .tmp files from the %appdata% folder, I've tried using Windows to "Restore previous versions" but to no avail. I thought I was on to something when I tried to import the corrupted .stroy file into a new project as I could see all the slides and select which to import, but when I try to import, I get "the file is being used by another process or you do not have the proper security permission to access." See attached screenshot.

Am I out of luck? Anyone willing to open my project and see if there's any way to save it? Please?I'm so very disheartened that all of my work is gone. Any help or encouragement is much appreciated.