The “New” version just has a little bit more features added in and the code is cleaned up in certain areas on the backend. It’s designed for the latest version of Genesis/WordPress.
The old version will still work fine, but I would much rather you use the newer version if you can.
There isn’t anything inside the theme files that have anything related to “Colibri” so that’s why I’m wondering what else could be going on. Not sure if it’s a WP issue or what, but I can definitely find out.
If you want, I can log in for you to investigate what’s going on if you like. Just let me know!