The only real problem I have with RC4 is lack of callsigns. Did you ever consider releasing an update with missing popular callsigns since it can be years until new RC version?

what callsigns are missing? sometimes they are mislabled in the ai config files. sometimes they aren't properly coded in the c4.csv file. jd

TUIfly.com, Copa Air Lines, kulula.com, Pegasus Airlines, S7 Airlines, SpiceJet, Sun Country Airlines, ... but I don't care about them really... I'm missing a callsign for our national airline "Adria Airways" which was founded in 1961 and is the only major commercial airline for Slovenia. It's on the list for RC5 but not to be found in RC4 which is a shame for me... or it wasn't properly coded?

Sun Country is coded. Others mentioned are not.

As I said, the one I miss the most is Adria Airways. That's why I asked for an update since RC5 is probably going to be much more than just more callsigns.