Simply put the .rb file in your Sketchup plugins folder. Then you will find the bevel tool in context menu (right button click of the mouse).
I'm doing that in Sketchup Plugins folder in Snow Leopard, but I'm not finding anything on Right Click. Any help is appreciated.
Sorry for bumping an old thread like this but I just installed this plugin today and was trying to get what you have shown above working but I can't for the life of me get what you have shown in your images in SU.
I made a box then push-pulled another box on top of that and placed in a line like you have shown. When I select all and control click (OSX) on the selected items and choose Bevel it just deselects what I have but doesn't apply any bevel to the objects.
Please could someone let me in on what I'm doing wrong?
Download this one instead. It's a lot better. Please read carefully the very first post by Fredo for installation and required additional library.