Custom Data je defaultně prázdná jen s texťákem který má toto:
Place newer navigational data for the global database in THIS folder.
If you want to replace any of X-Plane's
earth_nav.dat
earth_awy.dat
earth_fix.dat
CIFP/*
with newer data, then place them HERE IN THIS FOLDER to avoid conflicts with the X-Plane updater.
Note that this database is also used by X-Plane’s GPS and previously needed files in other subfolders are now ignored.
