One of the irritating things about Malwarebytes is that they have abandoned command line scripts.
Command line was a handy facility so that (in my case) on the first of the month Malwarebytes could be told to update itself and run a full or quick scan, if nothing was found it would then terminate and rest of my back up and shut down scripts would run as they do every day.
I don’t know why they abandoned it because other programs like Ccleaner still have a command line facility.
As I say, irritating, but not the end of the world