I’ve been playing with various 2.79 test builds over the past couple of weeks. Last Thursday, I launched Blender on my home PC (Windows 10) and it immediately quit before the main window loaded. I couldn’t get it to get past that. Messing around with my saved preferences (C:\Users<user>\AppData\Roaming\Blender Foundation\Blender), I determined that Blender would only open if I removed all the contents of the <i>2.79\config folder. Once I did so, of course Blender was essentially running stock preferences, but everything seems to work.
I updated Blender at work yesterday (not thinking), and now I have the same problem there (Windows 7 Professional).
I still have my 2.78 preferences, but if I import them Blender starts crashing at load again.
Is there a way to determine what the problem might be, or how I might be able to save my old preferences? I’d really prefer not to have to go through and re-set all my preferences, re-create my startup file, and re-enable all my add-ons.