Strange, there doesn't appear to be anything in your site's source code indicating it has anything to do with WordPress, and even WP-based ecommerce sites that don't use the blog-post format still typically show quite a lot of references to WP resources in their pages' source code.
I can only wonder if maybe your site developer used WP to generate the initial page code for your site, but then exported and modified those pages independently of WP, so they're not actively generated or managed by the WP software anymore? WP plugins only work with sites that are currently using WP actively to manage their content and generate their page output.
We did not develop the WP E-junkie plugin, so we don't really know much about it and would recommend contacting the person who developed and maintains the plugin, through the contact page on his site:
http://wpejunkie.com/contact/
