That’s why is coming the new version 2 of their S550 Citation II, fully compatible with P3D v4 and other common platformes like P3D v3/v2 and FSX, FSX:SE. The rest of the improvements include “GTN750 integration, updated ADF, updated transponder. idle and engines cut off positions added, speed tape corrected and suction indication is showing correctly now“.
Note : your old serial number is valid if you are a registered customer. Free update !
Also available, the Navigraph Extension Pack version 1.1 here.