Yes i am a Premium Member on Sketchup !
But sorry there is a mistake on my last post. I'm not using Sketchup 2013 but Sketchup 8 pro
Thank you for your answer

Hello !
This plugin seems to be very usefull
I would love to know if it is compatible with sketchup 2013?
I'm using sketchup 2013 for mac and the plugin doesn't appear when i downloaded it
Thank you for your help