If you ever used a credit card to pay for membership, you get set up for auto-renew, and if there's a way to opt out I couldn't find it. One of the reasons I'm not a supporting member anymore, I got opted into a couple of things that I couldn't opt out of myself and I don't want to risk that again if I have no control. I did message support dev and they refunded the fee and said they canceled auto-renew, so if you didn't want to renew I don't think you'll have any trouble getting a refund.Then there should be someplace to opt out.