What you’re describing (“offline activation key” outside of official license purchase channels) typically refers to either:
: For a modern, supported experience, you can find the current version at Guitar Pro Official ; former licensed users often qualify for a 50% discount on upgrades. Guitar Pro or checking the compatibility of your current OS with Guitar Pro 6? GP6 - Guitar Pro 6 offline activation – Support Guitar Pro 6 Offline Activation Key -
If you have a valid license ID and User ID but no internet connection on your music computer: Enter this back into the Guitar Pro 6
: The website will provide a final activation key. Enter this back into the Guitar Pro 6 Guitar Pro 6 Offline Activation Key -
Please note that official support for Guitar Pro 6 ended in , so the technical team may no longer be able to guarantee its performance on newer operating systems.