RXP GTN in P3Dv5.3 Only Partial Functionality

Newly installed P3Dv5.3 with latest hotfix...newly installed RXP GTN version 2.5.29, in 3 different newly installed aircraft (Carenado C56XL, Carenado Phenom 300, Flysimware Falcon 50).  The GTN powers up but there is no navigation or terrain database.  The map screen is blank.  Nearest airport shows none.  No waypoints, VORs, procedures, etc to find.  And 3 of the main screen funtions are unavailable (Traffic, Weather, Services).  All 3 functions are faaded out and can't be clicked.  System status shows using Garmin trainer 6.62.4.  Tried updating the Garmin trainer to the newer versions that are available but since they're not compatible with the RXP that was no help.