After payment of Travian-bot send message to the administrator by e-mail:

e-mail admin Travian-bot

Must be reported:
1) Your e-mail filled in paypal payment
2) "Computer ID" as in Figure:

Computer ID in Travian-bot

You will receive a license number on your e-mail.
Licenses are sent usually fast, but can not send licenses at night, so do not worry if you have to wait long for an answer.
Obtained the license number type in the "License number" field:

(you can copy / paste)

License number for Travian-bot

and click "Save settings" -
below will be written "Registered - OK - Full" (instead of "UNREGISTERED!!! - DEMO")