Unfortunately, I’m planning to remove this feature in the future updates since the Genesis Theme Settings page is gone and the code has changed. It would have to be completely recoded and I would rather leave that type of functionality out of the theme since it’s outdated with the current WP/Genesis standards.
There are a lot of portfolio plugins available now which should get the job done much better. When I originally added it to my themes back in 2011 there weren’t that many Portfolio plugins available at the time. Now there’s a lot to choose from in the WP repository (free) and also Premium as well.
If you come across any that you like please let me know.