Mod edit: The request below has been withdrawn by the original poster (OP). However, given the large amount of support already give to this wishlist item, the thread has been left open. It would not be appropriate to contact the OP to ask for more information as this is the only information available.
Since there are various issues with Premium and Deluxe aircraft and the status for fixing these items are backlog we request that the .cfg files for these airplanes are unlocked from the .fsarchive structure. The community has a number of people who are very good at modifying airplanes for more realistic performance and are unable to touch the premium and deluxe content due to the DRM.
EDIT: On 13 July 2021 this thread was modified to include requests for removing the .cfg files from the encrypted .fsarchive file system for Marketplace aircraft.