If at anytime you would like to cancel your account, you may do so through your account panel.
Here's how:
1) Login to your account here: http://prettyforum.com/amember/member.php
2) Under the "Your Payment History" tab, you will see your current subscription level. You may click on the "cancel" link to end your subscription.
Alternatively, you may also cancel your account directly through your Paypal account.
You can cancel your recurring membership at any time, and your account will remain fully active until your current subscription ends.