• you misspelled the registration name when purchsing.
• by mistake you registered to yourself as a person and not to your company/organisation.
• the name of your company has changed.

If you need to change the registration name for some reason just contact us through our support ticket system and we can generate new details for you. Since version 8.0 the uninstaller will remove all registration information from the system. So to register SQLyog with new details you can simple uninstall and install again. First time the program starts after the reinstall it will prompt you for registration details.

With versions before 8.0 we cannot help with this!