Exterior Registration mark - changes not saved

[StippiPIC]

Hi there,

i`m in the FBO, gone outside to the airplane, opened Airframe Manger, clicked "Edit Appearance, changed exter. reg. Mark like the way i want it to be, all fine.

BUT, next time i started the same aircraft also in career mode, changes on exterior reg. marks lost and marks layout shown in default state again.

How can i save may changes. Can`t see any specific "save-button" for this,

cheers, Stefan