Comments Plus plugin customisation

I've installed and configured your Comments Plus plugin on my site and it works great, however I've enabled the Custom Comment Template option as what the way my comments section was looking was a little flat, and while I can still see the comments not much of anything has changed.
I've tried copying the 'wdcp-custom_comments_template.php' in to the theme folder and renaming it 'comments.php' but this doesn't seem to have changed anything either.
The page where I've been testing this out on is:

Could you advise please?