To Refresh License
1) Go to Webuzo Admin Panel and click on "Refresh License" .

OR
2) You can also refresh the license by executing the CRON command. SSH to your server as root and enter following commands :
/usr/local/emps/bin/php /usr/local/webuzo/cron.php
This will force CRON to run and Softaculous will synchronize all necessary information.