If you're experiencing problems using the Logic integration for either the Launchpad range, the Launchkey MK3 range or the SL MkIII range you may find the below steps a useful piece of troubleshooting as they reset Logic's Control Surface preferences in a way the user cannot.

1. Turn off your Novation device
2. Exit Logic Pro X
3. Open Finder
4. Press Shift + CMD + G
5. Navigate to ~/Library/Preferences/
6. Delete the file 'com.apple.logic.pro.cs'
7. Restart Logic Pro X
8. Turn your Novation device back on 

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