Instead, go to Site Settings->Site Content Type Gallery ->select content type->Advanced Settings -> Edit Template:
Jun 16, 2011
Redesign an infopath template from sharepoint site
If you publish an infopath template directly to a sharepoint library, you can design (redesign) it later with InfoPath client, but what if you publish the template as a content type or as administrator approved form? you will NOT be able to do the same thing as direct publish by browsing sharepoint library.