I have tried having both the "Configuring Default Inputs..." window up as well as the cmd window that launched the input selection process both were active.
You said though the game window needs to be active? Do you mean the game has to be launched?
The documentation says,
"To reconfigure inputs, use the -config-inputs command line option. This will open up a blank window while printing instructions to the command prompt window. Make sure that the blank Supermodel window is selected while following the prompts, otherwise your key strokes and inputs will not be captured. Supermodel has full support for joysticks, gamepads, and wheels."
I did that as it stated, made sure the blank Supermodel window is selected.. but its not capturing any inputs
