Here is a systematic recovery guide:

Your time is better spent practicing guitar than wrestling with obsolete DRM or risking your computer’s security. The future of tablature software is bright — and it doesn’t rely on User IDs from 2010.

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Both identifiers are required to validate the software. Leaving one blank or failing to enter both correctly will result in a failed activation. How to Retrieve Your Lost IDs

This acts as the specific serial number or product key for the software installation. It consists of a series of letters and numbers separated by hyphens (e.g., XXXXX-XXXXX-XXXXX ).

When you purchase the software, these are sent via email. During activation, the software "calls home" to the Arobas Music servers to verify that the credentials are valid and haven't been used on more than the allowed number of computers (typically five). Why "Free" Keys Online Rarely Work

Take that code to a computer with internet and visit the Guitar Pro activation page to generate a final activation key. Important Compatibility Note Please be aware that Guitar Pro 6