When I installed the LC for the brakes and the new Fanatec control module, the brf setting started working as soon as I plugged the brakes to the wheelbase. Does your wheel show 335-018 when it starts up? Are you sure you didn't accidentally re-install the old pedal module?
Did you un-check combined pedals in the windows driver and re-map in game??
My setup that I'm running on the PS4 wheel is:
FF 60
sho 100
abs off
dri -05
for 100
spr 100
brf 030
fei 050
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Assetto:
gain 74
filter 0
min 0
Kerb 52
road 56
slip 17
abs 26