I have AI from more than one source (utlive, AIG-AIM and more). EVP manages to find the missing callsigns (the ones not present in airlines.cfg) only for the models in the utlive folder. It seems oblivious to the other folders.
EVP 6.0.1 on p3d V4.5
Thanks, got the file and will look into it. No ETA yet. Just to clarify, the add-on.xml file you sent is this one, right? C:\ProgramData\Lockheed Martin\Prepar3D v4\add-ons.cfg