I was gladly using 14 with no problems but I was working on an important video project, so I thought I'd upgrade to 15. So far, it's been a mistake.
It's constantly shutting down (which it did again while I was writing this)
I read elsewhere that I should turn off the autosave and that will fix it....but it did...then it didn't.
Was your project created in version 15, or did you begin the project in version 14 and then open it in version 15 to finish it? That's been known to cause buggy behavior.
Beyond that, what operating system are you using? Which processor do you have with how much RAM and how much free, clean, defragmented space on your hard drive?
What model of camcorder is your video coming from? What format and resolution is the video? How long is your project?
If you start a project and add a few video clips to it, does the program crash -- or do your problems seem limited to this project?