Project won't load

I get an error that says there is “no sketch found” in the project directoy

I can unzip the project and all the parts files are present.

How can I recover the project ?

This doesn’t help, but someone had a FZ crash and his files weren’t recoverable.

I found I had recently emailed it to someone and that copy loaded.
Maybe I will look at the differences to see what FZ did to the file.