Or just read the facts D-ECHO
"Hi there!
FGMembers was started as an alternative to the official FGAddon aircraft repository, due to disputes about licensing and removing of copyrighted content, I would not recommend to get involved there, I personally avoid it. See also the FGMembers statement on flightgear.org about this.
Bomber is a former forum user who was/maybe is active with FGMembers but has been permanently banned from this forum for repeatedly breaking its rules.
All official parts of FG use the GNU General Public License, version 2 or later, as this has proven to help grow the project, especially as it also allows commercial usage, e.g. in professionnal flight simulators. Some aircraft addons use other, more restrictive licenses."
And for someone that avoids this place...436 posts
viewtopic.php?f=15&t=1354
"If anyone ever tells you anything about an aeroplane which is so bloody complicated you can't understand it, take it from me - it's all balls" - R J Mitchell