I am only allowed three airports on my version. Can I delete one and then add another? Or do the three I chose initially have to remain, unless I upgrade?
You can manage the airports you have listed by logging in on our site. Then hover over My FlightAware in the upper left corner. It should drop down some options. Click on Manage. This should redirect you to where you can add/remove airports on your My Airports. Each airport code will have an X above it, click on the X for the airport you want to have removed.