Please forward your activation key to our support so that we can deactivate it. Note that there is some problem with your current email address. We regularly get “delivery failed” reports from your email provider. Please contact us from an alternate email.
You can find the registration key used by VisualGDB in registry (HKEY_CURRENT_USER\SOFTWARE\Sysprogs\VisualGDB\Settings\RegistrationKey).
However, please note that it your support has expired a few years ago, the latest VisualGDB version will not work with your key, and the older version may not support the latest VS. You can find out more on the following page: https://sysprogs.com/splm/mykey