I just replaced Catalyst with Crimson ReLive and am disappointed with the default results when using Google Earth Flight Simulator.
Maneuvering the aircraft (with Saitek X52) is no longer smooth, but is now unstable, jittery and jumpy.
Many thanks for your help with a solution.
System: W7 using AMD FX-4100 and Radeon 7900.
Internet download rate is 30Mb.