If you've changed something about an airport, country or region on Terminal it can take a while for Dealbot to reflect those changes. You can force Dealbot to reload here.

Warning: You should refresh all cities selectively, because there's lots of them. It's best to reload those individually.

You can either add a new airport by writing its details manually or import a new airport that has been added to Terminal. If you need the airport on Terminal (e.g. to use in markup) you should create it there then import it here.