No choice of plane and airport

The issue is that you have a non-ascii character in your Windows 10 account/user name. See this post/topic:

https://forums.flightsimulator.com/t/i-cannot-load-any-different-airport-and-plane-always-the-same-airport-and-same-aircraft-non-ascii-windows-10-account-name/302113/95

Make sure you up vote that topic so the devs are aware as well as file a zendesk on it.