Whenever InDesign starts quitting on me, I delete the "InDesign Defaults" and "InDesign SavedData" files from the Adobe InDesign folder in the system Preferences. When you relaunch InDesign, it will rebuild both files, so once you've relaunched it, set up all your settings for default page size, measurements, colours, hyphenation, etc. and then make a copy of the 2 files so you can simply replace them if it happens again.