Using paypal as an existing premium customer.

Many thank yous for the posibility to use paypal as a payment option.
However, as an existing premium customer, I don't see an option in my account to change from using a charge card to paypal, even though I do see it in the new account sign up page. Is this something which will be added anytime soon, or will I need to cancel my account and re-sign up, and posibly loose my current invites in the process?

Regards,
/Dennis

P.S Sorry for double posting, the above comment was also made in an existing thread but it's marked as implemented and not needing answer so I wasn't sure if it'd trigger a reply.