New
#11
I love the analogy of taking a shower with a raincoat on but, in this case. a better one would be belt a suspenders. MBAM's purpose is to be there should something slip past the AV. The problem with just using MBAM's scanner is, should something slip past your AV (and, face it, even the best AVs will occasionally let something through), it will stay on your computer, potentially, if not actually, doing harm until you update the free version of MBAM and run a scan on it. A virus that got past your AV could clean out your bank accounts, steal your identity, etc. before you manually run a scan.
The full version of MBAM both automagically updates itself and watches fulltime for anything that "snuck" past the AV. I've been using MBAM Pro for some time on two different computers and I can't tell it's running at all; it definitely does NOT interfere with the functioning of my machines, unlike some programs, like Norton.
If you get the free license before they become unavailable, it's a onetime cost. Once paid for, you never have to pay for it again. That's pretty cheap insurance.