I strongly doubt you can run two QlikView servers on the same machine.
Membership of local security group sounds like "the user running the services is not part of the QlikView Administrators group".
An unlicensed server will hardly show you anything as the license decides what functionality is unlocked.
If this helps:
The QV12 QMC looks very much the same as the QV11.2 QMC. Or at least I did not notice any changes yet (granted I only played with it 3 days). There is hardly any new functionality in QV12. The main change is the engine now being the QIX engine, which gives better performance.