We have urgent situation with implementing code into Wysija.
Basically, we are using Woocommerce plugin for product listing as custom posts (custom post type) and we need to insert those products (custom posts) into Wysija newsletter, so the user can choose which products to add to Wysija newsletter theme. For example, when I insert "WordPress post" into newsletter theme, it pop-up the window with posts list.. I need to dublicate similar example, but only for Woocomerce products.
Where (in which file/files or code rows) can I do it? I've been searching for days. Thank you all in advance.