This doesn't work on SSL-based sites, but one small tweak will fix it. In public -> js -> FeedEk -> FeedEK.js the call to to googleapis should be protocol agnostic - so, just
In other words, take off the http
The other small problem, which really isn't a problem, is that when it breaks on SSL there's a broken image where the feed should be. The image is the loader.gif image is in public -> js -> FeedEk, but it's trying to load the image from the root directory of the site. Not quite sure where that problem is coming from though…
Once the call to googleapis is fixed it's a great mod. Thanks!