Restore a backup copy of a project file

I made a backup copy of a very important project. Good thing because somehow the file is corrupted (I was working on it, then the screen went black, Rush crashed and when I opened it again it appears that the entire project is now empty). How do I get Adobe Rush to recognize the backup copy of the project folder and show it in the list of Projects on the Home page?  Sadly, I had not done a backup of my Mac on Time Machine for over a week and can't do it from there.