Hello.  Often when I launch Prepar3d in full screen mode, 4k resolution, I get a black border along the bottom and right side that cuts off part of the picture.  Restarting the program works, but it's an annoyance.  Does anyone know what's causing the problem and how to fix it?  I've attached a screen shot.  Thanks.

 

Nvidia GTX 980 Ti (latest drivers)

Anyone else have this problem?  I've confirmed that I don't need to restart prepar3d, I just need to recreate a scenario and it'll load up properly with the entire screen filled.