Organic modelling toolset. For SketchUp 6 and up. PC and Mac compatible.
Unzip the file you downloaded.
You should now have a file named 'subsmooth_loader.rb' and a folder named 'Subsmooth'.
Copy both the file and folder to your SketchUp/Plugins directory.
Close SketchUp if you have it open.
If you do not see the Subdivide and Smooth toolbar, go to Window->Preferences->Extensions and make sure that 'Subdivide and Smooth' is checked.
A new menu item will be created under your 'Tools' menu and you will see a new toolbar.
If you are on a Mac and the icons do not display, you need to install the plugin to the Users/username/Library/Application Support/Google Sketchup/SketchUp/Plugins folder
Bug splats can occur when using other plugins such as SketchyFFD, JointPushPull, Offset On Surface, etc. while editing a subdivision proxy. It is recommended to only use the standard SketchUp tools (and the tools included with this plugin) while editing a subdivision proxy.
Bug splats can occur while using the 'Extrude' tool when multiple faces are selected on a proxy.
Bug splats can occur when using the 'Knife Tool'
Using the 'Subdivide Selection' tool may cause bugsplats or SketchUp to hang in rare situations.
If you 'Undo' an operation while editing a subdivision proxy, you will not be able to use the 'Redo' command.
If you cut and paste a proxy, it will no longer behave as a proxy. You must select it and then click the 'Subdivide and Smooth' icon to re-create the proxy.