FSX:SE. From what I seem to understand, the PA-23-250 from Aeroplane Heaven will sold exclusively through FSX Steam Edition. I have come up with a few reasons why the team has chosen this avenue but honestly, I don't care at this point. This decision does indeed alienate a rather large group but given the fact that Alabeo is out with a very similar model of their own, I now conclude the latter will be the more popular of the two anyway. I am pleased to see developers getting behind all platforms but the exclusivity to just one I think is more of a loss to the developer than it is to the community. Let's see if it gets a wide release after a few months which was the better route Orbx had chosen.
Update: Aeroplane Heaven Responds As Have I.