If you bought before late May 2017, it most likely won't renew automatically.
The advantage of continuing your automated renewal is that you get to keep your current price even if the new subscriber price increases. If you no longer want it when it renews, you also have thirty days to get that charge fully refunded.
If you bought using PayPal, you can cancel renewals from your PayPal account. PayPal has instructions at https://www.paypal.com/selfhelp/article/FAQ2058
If you didn't buy using PayPal, you can stop renewals using the manage subscriptions link in your receipt email. Or you can contact us to stop renewals for you.