Captain Sim wrote on Jan 9^th, 2019 at 4:05pm:

EDawg109 wrote on Jan 9th, 2019 at 5:57am: I purchased both the base pack and expansion at the same time in Jan 2017, the 737 Captain [Base] says [FSX/SE] and the 737 Captain (737-200ADV) Expansion Model says [FSX/SE/P3D3] in my account.  Why don't I have the P3Dv4 update? Because you've purchased FSX version, so you are in the group B above.

It's a shame that folks that purchased the FSX version don't get some sort of discount for basically an upgrade to the P3D version. Thanks anyway for the info.