Why does my flight simulator show that it is connected as a FreeFlight device?

It is likely that UDP Port 4000 is being used to send data to ForeFlight Mobile from your flight simulator.  This is the port that ForeFlight Mobile listens to for data from the FreeFlight line of installed ADS-B receivers, and when the app receives data there, ForeFlight Mobile sees it as a FreeFlight device.

Please check your network connection settings and make sure that the simulator is not using UDP Port 4000.