Had this hit me also. Thought it was Kerbal Space Program doing it, but I was just sitting at the Space Center view which usually doesn't affect CPU or RAM that much. Holy heck, 30GB used...? Killed it in task manager (which made CPU usage jump to 100%), it restarted itself. Real Time Protection disabled...? That's odd. Rebooted. Still acted up, gobbling up RAM. Finally uninstalled it. A pity, MWB has been my go-to solution for real-time protection.
Once they get it fixed, I'll reinstall it. Now to remove it from my other machines for the (hopefully) short term.