@Dave-R Thanks for the reply.
So both the objects (the collider/table & the face/table cloth) must be in separate groups, and not click on them directly (inside the group).
Got it.

I learned about Clothworks from an external source & their video tutorial did not specify that.

Thanks again for the clarification
Best regards.

Hello to all.
I am having this issue. I've restarted Sketchup after installing the plugin & verifying that it's enabled, but no context menu when I right-click on a bare surface (not a group or a component).

Any suggestions?