Introductory Remote-Control Pop-Up Won't Go Away

Can somebody please explain how to remove this pop–up on a Mac? 

1. The software is installed, so the pop–up's information is irrelevant.

2. Uninstalling the software does not help.  The pop–up still lingers.

3. I've tried a few CLI suggestions to _really_ remove the software, also without result. 

Thank you

Mac OS Monterey 12.4