Not sure if this is the problem here but today it surfaced that a recent update is causing havoc with the software and it's recommended to uninstall, run the cleanup tool, reboot and reinstall.
See the announcement at the top of the main home page: https://community.mcafee.com/community/home/
So how do I run the cleanup tool and reboot? It can't be that hard to uninstall.
(Sorry, I have as much technical knowledge as someone who lives under a rock.)