Unexpected quit, saved changes lost

I was working on editnig a PDF through EndNote, i.e. adding highlights, notes, comments. 

I continually save with the Mac hotkey, Command+s, whenever I’m working on editing like this.

I was moving around one of the yellow comment boxes when EndNote suddenly quit. When I opened it back up, all the changes I’d made in the last hour were gone. Is there any way to recover this?