From the crew over at Flight One..
"Flight One Software is proud to announce the release of the Flight1 GTN Complete Edition. The GTN Complete Edition includes several products in one. You get BOTH the GTN 650 and 750 avionics that used to be sold separately, in one package. This new version includes updates allow the avionics package to work with FSX/FSX Steam, Prepar3D v3 and the newly released Prepar3D v4."