Standard user in trial period:
If you are still in your free trial period you don't need to do anything to cancel your membership. Since you have not activated a paid subscription (by entering your credit card or PayPal details) your membership will end automatically after the trial period.
Standard user with paid subscription:
If you are a paying subscriber, log in and follow this link to cancel your bellicon Home membership: http://video.bellicon.com/en/payments