If you enter your Ten Thumbs registration code and you see the above dialog then you are most likely trying to unlock the single user edition of Ten Thumbs using a multi-user code or the other way around. You know you have a multi-user registration code if the code starts with three letters. A single user registration code contains only numbers.

If you have a single user registration code make sure you download the single user version from our website.

If you have a multi-user registration code make sure you download the multi-user version from our website.