Hello Pete,
First time post, but have been using FSUIPC for years. Currently --- FSX (SP2 without Acceleration), FSUIPC Ver 4.664, and WIN7 (Service Pack 1) (x64).
My CH Flight Sim Yoke USB Aileron and Elevator Axes are calibrated with FSUIPC and I recently encountered similiar issues as reported by Nicholas. I suspect it has something to do with WIN7, Service Pack 1 and not FSUIPC.
Two days ago, I was unable to pitch up the LevelD 767 for take-off. The CH Flight SIM Yoke USB was essentially unresponsive. Sitting on the ground, in spot view, I could see the actual Elevator and Aileron deflections were only approximately 50% of full. In FSUIPC, the reported values for Aileron and Elevator were also approximately 50% of previous values. (Reverting to version 4.657, just to check, made no difference.) Re-calibrating in FSUIPC Ver 4.664 to these newer values restored full Aileron and Elevator deflection. BTW, observed similiar behavior with the FSX default Cessna 172's.
Here are the FSUIPC value differences (For now I did not attempt to change the middle values):
Before installing WIN7 Service Pack 1: Aileron=-16383,-512,512,16383
Elevator=-16383,-512,512,13472
After installing Win Service Pack1: Aileron=-7040,-512,512,6784
Elevator=-7040,-512,512,5056
Again, I think FSUIPC is functioning as intended, but Win7( SP1) and FSX are now reporting different values for the joystick axes.
Claude