Haven't noticed any improvements on my rig. There seems to be an issue with the ATC window, too. When I close it or try to re-size or move the window there is another window still in the original position. the only way I have been able to close it is to right click with the mouse and close the window from there. I'm not alone with this issue as I have seen it reported on the Prepar3D forums. Hoping there is some easy fix, but for now I'm ready to uninstall 4.5 and revert to 4.4.