I have Avast Antivirus Free on my Mac OS X Mojave 10.14.6 (18G6020). It's been okay for a few years, but now when I try to launch it, it silently fails. Just doesn't get started up. I wanted to reinstall it, but setup demands me to uninstall it first. The tutorial on uninstall requires me to run it first. It's a vicious circle. How do I poke the darn thing out of my Mac?