I've installed the licensed V3.0
I'm using SketchUp 2020
Couldn't get it to work so thought I'd try a simple shape, but still no joy?
restarted a few times, renamed group EXTG, but nothing seems to work.
anything else I can try?

I purchased a license for CutNfill on the 15th of April and haven't yet received it. Can you send the license please?