I even tried “select all” and then click "Intersect faces’ and ‘with model’ or ‘with selection’ and then erase the circle or rectangle but it still does not work.
Not sure if I understood your question but I will reply to you anyway based on my understanding.
Question: How do you use these components that you are swapping between programs?
I’m a kitchen designer using a 3D design software preloaded with a vast library of catalogue items. Sometimes, I have clients wanting to have customised doors so I have to modify them in Sketchup. I can’t do this in my software program.
Once I modify them successfully in Sketchup, I export them back and import into my software.
Q:What do you do with them in SketchUp?
As mentioned above, I use the basic tools to cut holes or make minor tweaks to cabinet doors.