Have the same Problem as superkekx.
After the configuration of my P-51D sim Profil a TF-51D Folder is created but no P-51D Folder. Ingame i have two P-51D sim entrys. One with default configuration and one with my settings i had done in the launcher options.
An other issue is that my P-51D sim configuration has no entrys for weapon configuration in the list :(
Looks like a wrong label: The P-51D sim settings means the TF-51D sim and this palne is a Trainer without weapons and the real P-51D configuration option is missing.
I use the german steam Version of DCS and I hope you understand my english.
@superkekx: Have you solved your Problem or has sithspawn given you any suggestions?
Update:
Doing a completly reinstall but the problem still occurs :(
I can't configure the weapon controlls for the P-51D. There are still no entrys.