For USA Pilots: With the release of Navgps Pro 3.12, Navgps now uses av-data from both DAFIF and FAA sources - all airports and fixes should be available
Non-public (i.e. private and military) airports are now available...though by default they're disabled and need to be enabled.
Also, more detailed information on each airport...like fuel availability and traffic-patterns for each runway.
The new database format is compatible with Navgps Basic - but because of needed changes in the format, Basic may not display all the available airports. Basic users can still download and use the previous format sample av-data files.