Note:
1. You received Auth Code in your registered email
2. Keep same registered property name to use auth code
3. You can use same Auth code for all the purchased licenses/Terminals
4. Use same Auth code surrender or reactive license again

Activate License: Follow bellow steps to active license

From eZee Burrp:
Screenshot 1: Open software as run as administrator and click on register button

Screenshot 2: Apply Property Authcode

From eZee POS Burrpbackoffice:

Surrender License: You can only surrender license from eZee POS Backoffice 
Open eZee POS Backoffice as run as administrator and follow bellow steps to deactive / withdraw / Remove license