How do you know it's the SketchUcation toolset that's causing the mysterious crash ?
Are there any error messages at all.
If you open the Ruby Console before doing whatever it is that leads to this crash [you haven't explained how it manifests itself], are there any messages in the Console ?
Can you explain step-by-step what you do to get SketchUp to crash...
Usually a BugSplat or error message will result, a silent crash is very unusual.
Do you have any other extensions running - e.g. renderers...
