e-Newsletter Custom Themes not detecting in wp-content/uploads

So I just got e-Newsletter up and running and I wish to make a custom theme for a clients website.

I did everything the instructions told me to do but the theme doesn't appear in the theme selection part of the creation tool.

I have a the plugin activated on a single blog on my multisite network. So I created the folder wp-content/uploads/917/enewsletter-custom-themes and added a copy of the theme I want to modify to the folder and renamed the style.css etc.

However it does not detect when I go to select it from the creation tool.

Is there anything else I need to do? I can't see anything in the settings. And the folder permissions are set to 755.