I uploaded a couple of Rick Deltens Giant Scale airplanes into G 3.5. No problem. Worked great until I exited 3.5 and re-opened 3.5. I then get the message "The aircraft variant cannot be loaded. It is based on an aircraft you do not have". Well, I had it when I uploaded it the first time but when I go back to 3.5 it says I now don't have it. ????