When creating a route and the error message appears that an airport with ICAO code "...." could not be found, then most probably the airport database is empty.   If the airport database is empty, then the DataProvider could not properly create the database.     Usually there are the following causes for this:   1) The path to the file "scenery.cfg" is not properly set.   If the path to the "scenery.cfg" is not properly set, the DataProvider doesn't kn