How to open a .aid file to save list work in Illustrator

My computer crashed while working in Adobe Illustrator. When I reopened Illustrator, I had a black screen and was unable to save my work. I quit and reopened the app but the recovery file did not open. Autosave is set up for every 2 minutes and I can see the autosaved version .aid but I can't get it to open. I've tried converting file to .ai, pdf, and eps.  When I try to open it in Acrobat I get the error "Adobe Acrobat could not open 'f54ee7a9-c886-4fcf-99a6-1bf792f7ed9c.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)." Thanks for any help on this.