Since Ef is closed on the weekends, you may even be able change it. Go to your account page then under 'Dashboard' you will see 'Order: Status, Changes, Returns'. Since it has not been shipped yet you should be able to make changes. If not just cancel and redo the order.
There is the option to add more than one address. Do what Tim said and cancel the order, then put it back in and use the new address. Or I think you can just add the new address and edit the order to ship there. If all else fails, there is the option to submit a support ticket.