I have the same problem here. I usually fly the Sim with my Hotas Cougar and no problem.
I borrowed the Hotas Warhog from my brother for Xmas and I installed the HW sofware and drivers on Beta3, ran the Sim, and no problem, just awesome, everything was alright, axis, keys, bouttons...
So Beta4 came out, I installed and
OMG!!! caos, same pitch and roll axis assingments for both throttle and joy, none of the buttons, TMS boat swictch or anything was as it was in Beta3.
Unfortunately I didn't save the config and assingmets of HW in Beta3.
I thing the best way to make HW to work is totally uninstalling sim and updates. Keep the Hotas in Windosw7.
Install A-10, and uptdates up to nr. 3, keep the config of HW, install Beta4, overwrite config and assingmetns file...
What do you reckon?