System is System 76 laptop running Ubuntu Studio 2017.10 Artful
I compiled and built 2018.2 FGFS , SIMGEAR, FGRUN and OPENSCENEGRAPH using download_and_compile.sh.
When I enter FGRUN the airport is reset to default.
When I go to choose an airport, it only lists installed and I wanted KASH Nashua, NH so I ask for all and enter KASH to choose it.
I then press NEXT and it is showing in command line and advanced choices.
At home I download using TerraSync then disable to avoid invoking elsewhere.
If I press Previous back to choose another aircraft I loose the airport and have to start over choosing KASH.
Even if I don't make any choices the airport disappears or is reset to default which may cause restart of TerraSync
If I remember it was too slow, I have it turned it off until I am home on a faster connection.
If not I have to ESCAPE out and start over and first step is to turn off TerraSync.
At this point the airport is back to Flightgear default and blank in advanced.