Supersonic

[jcar01]

How do I know if I ended up downloading the new Supersonic?

[jcar01]

I see it says that I have it in my Library, does that mean I am all set with it?

[andycishere]

A green bar at the shop page should indicate that the DLC is already in your library.
https://store.steampowered.com/app/1525630/Airport_CEO__Supersonic/

If you want it in your current savegame, you have to cancel all airline contracts and offers containing the new aircraft. (Olympus Organization, Zoom!, Stripe Air and Crown Airlines)
After a while the contracts appear again including the new planes.

[jcar01]

Okay i clicked on Install Game in your message and it took me right to the game login screen where I can start a new airport, load an airport. etc, etc. Does this mean Supersonic is downloaded and all set?

[andycishere]

Steam works weird, but yes, the DLC should be ready and the named 4 airlines should provide you the new planes.

/Edit: Large stand required