PayPal payment subscription

Hello all.
At the moment I have a paid age of Conan subscription for a year that is about to end. I want to make it per month. I used PayPal to pay.
Questions are:
When do I have to cancel one subscription and start the other?
Is there an option to cancel payment plan within PayPal or cancel it only in age of Conan account and it will be ok?
There used to be an option in PayPal to delete a payment plan that was automatically created but in New PayPal I cannot find it.
Thanks on advance.