Ok, done!!!!
The problem was a limitation on my permission!!!

Thanks a lot TIG for your help and for your great plugin

Thanks for your reply TIG

It's not the sketchup version the problem.

I tried your step by step advice but the toolbar is still not available.

It's the first time that the .rbz installation doesn't work properly (don't know why).

Hello, I have a problem. After having installed the extrude tools from the install extension (.rbz file) I cannot see the toolbar. I tried to re-install and nothing happens. Could you help me please.

Sketchup 2013 pro

Thanks a lot