X Men had alot more time spent on it by John Borg and was released with much more codework done compared to AC/DC.
It doesnt mean X Men has to get code added just because AC/DC has code added.
The last X Men code update was fine...what was the problem with that code work ?
Why not email and cc AMD and email Stern and ask John Borg/Jody Dakenberg politely about the X Men code and if it is due/required/the situation.
Thats the best way otherwise its all guesswork. You might be pleasantly surprised at the professional and polite response. Emailing Stern has always worked for me and I have always had great communication with them.