yep! happened with me apparently it went away when i disabled  User Account Control (UAC) that comes with windows defender.
alternatively just try to make CaptainSim folder and subfolders writable instead of readonly. IMO due to this the winglet models were not showing up as well because ACE tries to rewrite aircraft.cfg file but if UAC is active it keeps the Airplanes folder readonly and would not allow any changes.

Hope this helps