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The full version of Guitar Rack will only unlock with the connection of the Go Guitar Pro, if you have a Go Guitar you can still use the app, however, will be limited in the features you can use.
If your Go Guitar Pro will not unlock the full features of Guitar Rack please, try the steps below:

  1. Do a full system reboot of the device you are using.
  2. To rule out an issue with the supplied cables plug in the Go Guitar Pro before opening the app and ensure your device recognises it.
  3. Ensure the app is fully up to date.
  4. Test on a different device running a different OS.

If none of the above resolve the issue, please submit a case for further assistance.