PMDG_737NGX.dll failure PMDG 737 for Prepar3d v2.5

[gpf3m 41]

Let me start by saying I have WIN 8.1 OS.  PMDG states this OS is not supported so perhaps there is where my issues lay.

 

If I select the 737 from the vehicle menu, and let it load, then change the vehicle to another aircraft, let that load, than select a PMDG 737, I get a OOM with the fault PMDG_737NGX.dll.

 

I am running the Prepar3d hotfix 2.5.12944.0

Also, if I select the PMDG 737 and let it load, than select another livery and let it load, the aircraft will have all systems off, and no click areas will work.  The engines however are running and you can accelerate.  If you than go to the vehicle menu and select a different aircraft, I get a CTD with the fault gdiplus.dll.

 

In my first post, I do not get a oom, but a CTD with the PMDG_737NGX.dll fault.