In the meantime, I got an export from FSX and took a look into the csv file. But as I didn't know the meaning of all the numbers in it, I can't write a converter script (hoped I can handle it with a little Python code).

So I will have to wait and polling OpenAir import as a highly wanted feature to be integrated into a next version of your wonderful free tool.  :)

I'm developing for X-Plane and only use X-Plane to fly VFR online in VATSIM. As all MSFS data is missing on my computer, Plan-G offers no airspace functions in it's map.

The airspace can be imported, but I didn't know the format. Can I import from OpenAir format text files, like the files from this website?

http://www.daec.de/fachbereiche/luftraum-flugbetrieb/luftraumdaten/

If I try to export, the file has no data (not a surprise), but this mean, I can't reverse-engineer the right format to write a converter script.

It would be nice to have up to date airspace info.  :)

Can you please tell me the right data format or post an example file to discover?