We're really sorry EasyStock was confusing! The app works with most themes out of the box, including the theme you mentioned you're using (in your initial review). So it just don't need any additional installation/configuration steps. We've just double checked on the clean copy of the theme from the Theme Store, and it's working perfectly.
Most probably, your theme has been customized manually or by 3rd party apps and the problem occurred.
Anyway, we'll be glad to check this and make sure the app is working properly on your store. Our support team was trying to reach you by email, but no luck. So please feel free to drop us a line to firstname.lastname@example.org and we'll be happy to assist.
Hope that makes things more clear. If you'll have any further questions feel free to contact our support team as it will be much more easier rather than editing review to the app here. Our support team is always happy to help!