FWIW I fixed a few crashing programs on my pc (new desktop, up-to-date drivers, defraged, etc.) by navigating in to the hiden folder "documents and settings[user]application data...", finding the offending program's folder and deleting all configuration data

You might want to make backups before you try it - but this fixed a Hexagon installation that crashed on startup

I.e., "documents and settings[user]application dataeoviahexagon 2" and deleted the complete hierarchy

Hope it helps...M