VCarve can’t open file: code 10

Anyone run into this before? A VCarve project file I saved about a year ago will no longer open. VCarve just says “can’t open file. Code: 10.”

Tried the CNC computer as well as the lobby computers. I’d hate to lose this work.

John, was it some of your “letter” files for your new set of blocks?

It is. Not that it’s a complicated design, but I had hoped I could make changes to the toolpaths without any guesswork.