How to change your membership plan
If you are a member of Aistear, then you can switch between Explore and Grow membership.
Go to My Account > Membership Plan where you'll be givent he option to change plans.
Note for PayPal subscriptions:
Please note that if your subscription is with PayPal currently, then you can't switch membership while keeping your PayPal subscription. You can however change plans if you choose the credit card option instead when upgrading or downgrading. If you really want to use PayPal still, an alternative is to cancel your current subscription, and sign up again with the same email address.