I've been trying to reduce the drag brake on my Justock I don't have the program card so i'm trying to change the settings using only the button but not having any success. The manual is a bit confusing. Here's what I've been doing:

Hold down Set
turn on esc
wait for the green led to flash twice
let go of SET
click Set twice to give 5% drag

but in the process, the motor just starts running abruptly and I have to turn it off and recalibrate and try again. What am I doing wrong?