Little information that might interest those who want to fly with the latest versions on FG 2020.3.0. Indeed the trunk repository cannot be used. But, because there is a but:
All my models, for example, have the line "<minimum-fg-version> 2018.2.0 </minimum-fg-version>" in the -set. So if you get them one by one and add them to your hard drive, you can fly with them. And I don't think I'm the only one doing this.
You can therefore retrieve them from the repository directly here:
http://mirrors.ibiblio.org/flightgear/ftp/Aircraft-trunk/ (zip format)
Or of course, concerning my models in my hangar here:
http://helijah.free.fr/ (tar.gz format)
Of course for models that you already have, you have to replace the old one with the new one
Have a good flight to all and once again a happy new year to all
Regards Emmanuel