Thank you.

I have a feature request:

Could you have the option to not purge components that are unused but have "XXXX_proxy" instances.
I use the proxy feature in maxwell exporter a lot. It allows me to swap in the more complex geometry on export.

Functionality would be a checkbox i think and an extra check when deleting an un used instance if the corresponding instance with _proxy appended to the name is used and iff that is true not delete it.

I changed two linkes to get the os x 10.6 bundled ruby 1.8.7 (patchlevel 174)

Also for me everything seems to work.

cd /Applications/Google SketchUp 8/SketchUp.app/Contents/Frameworks/Ruby.framework/Versions/A
mv Resources Resources.back
mv Ruby Ruby.back
ln -s /System/Library/Frameworks/Ruby.framework/Versions/Current/Resources Resources
ln -s /System/Library/Frameworks/Ruby.framework/Versions/Current/Ruby Ruby

to change back:

cd /Applications/Google SketchUp 8/SketchUp.app/Contents/Frameworks/Ruby.framework/Versions/A
rm Resources
rm Ruby
mv Resources.back Resources
mv Ruby.back Ruby