Sorry for the inconvenience, as the API key part is rather bolted on. If I find the time I will make it more user-friendly by supplying a configuration dialogue.
Until then you will have to supply the API key by adding '--apikey "YOURAPIKEYHERE"' to your desktop link. See https://github.com/fboes/aerof…o-the-desktop-application on how to do that.
So if your API key is "xyz", open the application by calling 'aerofly-wettergeraet-desktop.exe --apikey "xyz"'.