Touch the very top portion of the Q50's screen to bring down the menu. Select Settings, then select the "Advanced" button in the bottom right corner of the scree. Then select the "Z-wave" option. Once here, you'll see another "Advanced" button at the bottom of the screen, select it. Now press the "Factory Default" button.

Once you've finished with factory defaulting, now try to get the NevoConnect connected.

Oh yeah, and I'm not sure if you corrected your initial mistake, but make sure to put in the correct 4 digits of the Nevo ID number for the NevoConnect and then re-download the configuration to the Q50 so that it'll know who to talk to.