Help with Microsoft aircraft mod

I am trying to make a flight simulator simpit for a non-profit aviation museum
in Urbana, OH. I want to modify the flight model for the Local Legends
#5 Beechcraft D18S but
the files are encrypted. I contacted Carenado’s development team but they said
they dont own the plane anymore. This is a historic aircraft with over 100
exterior lights and flew for the inverter of aerospace lighting. Any help
would be appreciated. Here was my original request.