Frank, I'm having the identical problem. Purchased the full version of X-Plane 11 about a week ago. I was using SkyMaxx3 in XP10 with satisfaction, but now that I am using XP11 I see the limitation. I know that you ran a sale a while back, offering a 50% discount on an upgrade to SkyMaxx4, but I didn't do it at that time because I was happy with the way version 3 was working in XP10. Is there any possibility of offering a discount to those like me who just went to XP11 after the finished product was announced?
-Ed