in previous versions of premiere pro my project would crash, i would force quite the application and then would usually get a window asking if i would like to reopen the project and save it as a new file whilst it tries to salvage all i had done since last save. Since the latest premiere pro update to CC 2017 every time it crashes now i don't get that window and I have to open it from my last save, no recovery,
That means your project is crashing harder and quicker than it can respond. Save often and dont trust autosave.
Find your crash issues. The good thing about CC is that we have support. Call in and they will remote diagnose. They dont always figure it out, but they will clean up your install for you.
Not sure I can help. But it happens to me all the time. Here are a list of things to check, that I have found will crash the system.
1. LUT"S or Creative Looks that are outdated for the Premier Pro Version you have. If you have older lots installed, see if there are newer versions. This is my #1 system "crasher"
2. Sometimes running AE and Photoshop and Premier, will crash it in between the exchange. Not sure there is a fix, but I try to do my AE work and photoshop work first. Dynamic link never works well for me and I am using a solid system.
3. Obvious: make sure your program is updated ☺ Adobe likes to force you to update. LOL