You can renew your subscription at any moment. In order to do so simply follow these steps:
1.
Enter your e-mail and password.
2.
Select the menu option "My account" and then click on the option "Renew my subscription"
3.
Select the duration of subscription you require, 3, 6 or 12 months. If time still remains on your existing subscription then the period selected will be added to the remaining time.