A quick an dirty workaround for me: All things in the community folder did not work anymore! Next to the community folder there lies the folder "Official", inside this one the folder "Steam" and inside this folder you find the default content and some content purchased via the online shop. The content inside this folder (since I own the steam version, others may have varying folder name) simply works.

After I put non working content (aircraft) from my community folder into the official/steam folder it also worked propperly!

Maybe Iīll try putting the community folder inside the official folder or - for the time being - put my additional content into the "default" steam folder. Not a great solution indeed, but the update seems to have caused some trouble with the community folder content or its location.

Alex