Some updates before the latest, the departure and arrival airports had a list of recent airports right below the input line. This made it easy by simply scrolling down and finding the airport. Now, unless you enter the airport in the blank line, nothing happens. Also, some airports on the map have disappeared. Also, the globe map listed many more airport than it does now. For example, the globe map does not show Genova at all. I checked all the map filters, and don't see anything that would hide Genova and other airports. It appears as random, since some airports smaller than this one show up.

So today, when I tried creating a flight plan from Genova to Poretta in Corsica, both airports were missing on the globe.

I’ve seen this with several airports as well. My home base in Air Hauler 2, KMRY, has unfortunately disappeared. 

Just in case this is your issue, the quick list memory doesn't work when in dev mode.