To see if the plugins are installed correctly, pull down the plugins menu, and see if there is an item called 'tf rubies'.

I would not install the libraries under the plugins folder. I would put them somewhere with your own user space, not system space. I put mine in MyDocuments/Sketchup/Components/FS Timbers, etc.

Open the components window, and press the "flyout" menu button, which is the arrow the points to the right. Select "open or create local collection" and browse to the place you put the libraries. You may want to "add to favorites" once you have it open. CB.