I flew my two giant scale warbirds over the weekend and I am happy to report that the Firmware update did Not affect my other planes. I did speak with my buddy and he and I had the exact same experience;
We both have DX18G2 TX's and we are both working on new builds and installed the newest AR20310T receivers along with the AS3000 stabilization modules.
The planes were completely set up and all the sub trims were in correct neutral positions for centering of all control surfaces.
We then did the Firmware update to 2.01 on our TX's and afterwards noticed that Only One Aileron control surface moved off its mark considerably (about 1/4" on giant scale planes).