How to installing sketchup plugin rbz. SketchUp 8 and .rbz files, The latest version of SketchUp 8 allows you to install zipped Ruby files (.rbz) from within the product. If your plugin has a standard (.zip) extension, then you can just change the extension name from .zip to .rbz.
To install a SketchUp 8 Ruby plugin script with the .rbz format: