Dear Users,
I am sorry for all this trouble.
Our map download feature will come back. It is in the setup process. So the server will come back.
Until it is back, there is a new version of OpenRadar at https://sourceforge.net/projects/openradar/files/.
If this version is not able to download the files, it allows you to use this airport without background maps. You are properly informed and can work on. There are a few improvements, that you will notice. It has become quicker, it has become more stable.
Most of the delay has been caused by a Debian/Ubuntu specific issue: Their version of Java got a new accessibility feature that causes hangs and lockups sometimes of OpenRadar, sometimes of the whole window manager. We spend more than a month of intensive work until we found it.
Many thanks to Jomo for all the hours testing for me. (I don't use Ubuntu)!!!
I will update the official Wiki pages soon.
Wolfram