I've fixed the cause of the exception when leaving an airport area.
Please copy the attached file into your AFLT\P3D Files folder and either recompile your airport or also copy it into Documents\Prepar 3d v4 Add-ons\AFLT to P3D (in that order)
Once Prepar3d is running, open the Connect/Disconnect dialog. You'll notice it's somewhat different from before but don't worry about that. Just check the title bar to ensure is says version 4.0.03.
Please copy the attached file into your AFLT\P3D Files folder and either recompile your airport or also copy it into Documents\Prepar 3d v4 Add-ons\AFLT to P3D (in that order)
Once Prepar3d is running, open the Connect/Disconnect dialog. You'll notice it's somewhat different from before but don't worry about that. Just check the title bar to ensure is says version 4.0.03.

