If your key isn't working, it’s usually due to one of two things:
Enter the 25-digit activation key provided in your purchase confirmation email or on your physical product card. Install/Update : Once registered, Battery 4 will appear under the tab. Click to finalize the activation on your computer. Native Instruments Troubleshooting Missing from Library
Ensure you have the latest version installed on your Mac or PC. Log In: Use your Native ID (email and password).