I'm using these:
Wordpress 3.3.2 (multisite)
WooCommerce Print Invoices & Delivery Notes 1.2.1
Editing a post, when I try to add some media I can't. The problem is that at the bottom of all media lacks the "use this image" button.
The problem is in this file:
In order to solve/bypass that issue: on line 21, delete/comment "display: none;".
Please, check this on the plugin so I'm not sure if doing this change may affect its functionality.