I am trying to renew my membership that has expired. When I go into the manage purchases, there is no option to renew. I also cannot purchase a new membership because of my existing one. I paid using PayPal, I believe, but it doesn't look like it was set to auto-renew. I checked my emails and it looks like an invoice was generated from PayPal for me to pay last May. I didn't get one again this year. How can I renew my membership?