If you go to File, Recent projects, do you see the .cpr file there? Do you save your .cpr files to the same folder, or do you make a new folder for each song (the latter is what I would recommend)?
If you recorded with broadcast wave, you could import the audio files to a new empty project and do a “Move to Origin” This would set the files back to their original recording location. Then you would need to make your edits again.