I got the below warning today for one of my AI files that I was working on yesterday. The file had several layers that had been worked on for a number of days. I know that I shut the application down correctly yesterday, but the warning states otherwise. I had another file open yesterday and it is fine. In this file, all of my layers, except for 4 incomplete layers are now gone! I had saved the document several times yesterday, but it is showing none of those saved changes. Is there a way that I can get my file back????