Problem: how to separate groups of elements from a imported library

[calcioscacchi]

Hi everyone.
I'm using SH3D to draw my house. I've some troubles with imported elements:

for example: i would like to use this elements as a kitchen top.
https://3dwarehouse.sketchup.com/model/ ... -du-Marais

But in SW it's imported as a group of elements, and i can only edit the measures of the group. I can't separate the group in singular elements. Some images as explanation:




Does exist a method that help me to separate the group and let me work with a singular element?
Thanks

[Puybaret]

You should use a 3D editor like Blender or Sketchup to remove the items you don't want.

[calcioscacchi]

Ok, seems to work with sketchup. Thanks!