Can the paid version of malwarebytes and Norton Internet Security 2010 still work together?

Hi, I've seen forums on the free version but I've got the paid version of Malwarebytes along side with Norton Antivirus 2010.  So far, both programs  are not conflicting with each other as far as real time protection.  The other day, Norton still blocked a file and ridded my computer of an infections trojan.  And yes, when it came time, Malwarebytes did its job too, without causing any warning signs on Norton.  I know the free version hasn't got the real time scanner, but the paid version does, and I have the full fledged version.  When it comes time to upgrade to the next version, am I going to run into any issues?