For key prolongation for 48 hrs more, you need to specify email and site address which you specified at key creation. Also you'll need to specify API key sent to you via email. If you have not this key yet, you should create new key on API key creation page.
Please follow this page to receive exact directions on what to do with license key and learn how to use this service
Thanks for using of our service.
Beybegi.ru team.