I bought a new PC, loaded my newly purchased Xplane 10 using the two set dvds. This new PC died the next day so I returned it and got a another new PC. I loaded Xplane 10 again using the DVDs onto this second new pc and everything (including online updates) loaded well but when I got to the point of unlocking the full version and inserted disc 1 it would not open the program but just stayed at that gray window. Do I need to get another key to operate xplane as the dvd disc 1 unlock to full version doesn't seem to be working?