How to edit downloaded 3D Models?

SketchUp Pro
1

I downloaded 3D models from the 3D Warehouse. How can I modify this models?
I need to disable the group function, so I can modify parts of the models.

2

You don’t disable groups, you open them to edit.
Double click will open the group, edit it, then click outside the group to close it.

3

Hello “Box”

Thank you, this works!