1. Head in to Settings -> General and scroll down to the bottom for the MDM profile.
  2. Click the ScreenLimit MDM Profile and remove it.
  3. Press Home, find the ScreenLimit icon and long-press it so the app icons shake.
  4. Press the cross to remove the ScreenLimit app.
  5. To completely remove the settings for the device, also remove it from the Devices list of your ScreenLimit Dashboard (using the cog beside the device name).