If you are moving from overseas to the US: File a support ticket with the email address you used to pledge, an email address that works for paypal, and your new postal address in the US. I will refund the international shipping and ship to the US.
If you are moving from the US to overseas: Unfortunately there is no way to add to your pledge. You can have it delivered to a different US address (file a support ticket) or request a full refund. I'm sorry!