Ahhhh! Depending on the reason for SketchUp crashing, you may be losing a file called PrivatePreferences.jason which is sort of like the Windows Registry. It holds all the information about your SketchUp setup. How frequently does SketchUp crash and do you have an indication of why, or what you are doing when it happens?
Hmmm! SketchUp shouldn’t be crashing at all, let alone once an hour. When it crashes do you get the bug splat? It would be great if you could begin to recognize a pattern of crashes. Unfortunately, the bug splat doesn’t leave any clues for the user to interpret.
Do you have other plugins running besides SketchUp? If so, could you disable them and see if that helps? Also, I know this might be harder to check, but it would be interesting to know if SketchUp crashes at the same rate if CabWriter is disabled also.