Renewing Platinum Passes

This may have been asked before. I tried looking but gave up.

We had 4 platinum passes last year (on the payment plan) and I want to renew, do you just go to "buy passes" or is there somewhere you go to renew the passes we already have? I have not seen anywhere to renew online (I am using a mobile device so maybe that is the problem) forgive my ignorance :) can someone direct me please? Thank you in advance!

I think when you go to buy passes they might give you the option for renewing. I don't remember if that's how I did it or not.

You have to be on your desktop or something with "flash" to do the renewal. You just click on buy platinum passes, then it gives you the option to buy new or renewal with payment plan.