I am on Win10 and it allows you to calibrate the CH rudder pedals in exactly the same way as any other USB controller without the CH Control Manager - I just did it.
However, I could not get the brake pedals to work properly until I installed the Manager app. I didn’t open it, or change any settings, just installed it and the brakes worked. Set them up to use the Brake Axis rather than the other Brake settings - which I assume are for paddles or triggers - perhaps on an Xbox controller?.
Before installing the Manager, the brakes were clearly operating as if they were a joystick with -ve & +ve directions rather than a pair of sliders, meaning that unless you held them exactly half way at all times, they would be set to 100% on, regardless of whether you used the X+/Y+ options.
Once working, setting a 10% null zone and a small negative setting on the sensitivity to create a curve seemed to help an awful lot.