I'm also using the Flatter theme, and I just purchased your plugin.
Do you know what CSS I would need to add to get <a href="https://support.google.com/adsense/answer/3213689?hl=en" rel="nofollow">AdSense responsive ads</a> working?
Currently it's showing the wrong size ads e.g. http://imgur.com/QCj0kQf
Alexei, can you post the URL of your site and I will take a look for you.