Update: FlightSim Commander 9 V18.104.22.168
The tool FlightSim Commander 9 has been updated to version 22.214.171.124 and "supports" P3D V4.
Important note: FlightSim Commander Version 9.6 Revision 9 is, under certain conditions, compatible with Prepar3D V4. Requirement: The new and up-to-date FSUIPC5 5.1x from Pete Dowson is required for error-free connection and function of FlightSim Commander with Prepar3D V4. Limitations: FlightSim Commander Version 9.6 Revision 9 currently only identifies Add-On sceneries whose installation path was correctly entered in the file scenery.cfg located in the C:\ProgramData\Lockheed Martin\Prepar3D v4 folder.