@Scott Wilson, what you will find is that as Malwarebytes, A/V and other A/M applications grew over the last 2-3 years to the extent that they are no longer compatible running alongside each other; meaning you will need to remove Malwarebytes and most other A/M applications before installing an A/V application.
Unfortunately; Full Scans, Database Virus Definitions and network monitoring over the range of A/V applications have been conflicting with A/M applications. (Malwarebytes specifically.) It kind of gets like trying to force 2 people through a narrow door, this means look into the A/V and A/M applications and their compatibility before buying.
(A/V = Kaspersky, Sophos, Symantec, AVG, ect.. A/M = Malwarebytes, Spybot Search & Destroy, ect -- Also Comodo to an extent)
Currently, as it looks for most A/V applications and A/M applications; dimming are the days that they will be able to run along one side and the other. (Which honestly really sucks in my opinion..)
In the case of 'ThreatExpert Memory Scanner' and MalwareBytes however from the outset, they seem to be compatible; they do not provide the same functions nor do they provide live protection from threats; so the chances are they would not be conflicting.
Hopefully though this clears the air on A/V and A/M! (And makes sense too!)