Hi, I have downloaded and installed plugin as said at the first page. Works 100% (W7, SU2016pro). I would like to thank you for great saving of time 
Also if there will be some day an update, really helpful would be if plugin can also cuts only visible groups ... now I have to copy and move away from entire model what I want to cut and put it back when done. If I just turn off the layers, for example walls, terrain, windows, etc. and I can "play" only with roof tiles with no need to copy something... it´s just an opinion
It is 
and very useful plugin!
Cheers mate