Upgraded to zen 1.8a and installed this mod. It's listed under configuration but I don't have the autofill button anywhere. I also have super orders and fedex autofill installed. Should the USPS fill still work?
Well USPS autofill replaces the "admin/orders.php" file. If you are using superorders, you aren't using that file.
There is an included version for superorders as well. But if you already have the fedex one, then you have to merge them all together.