I’ve never used Thesis, but it looks like some kind of abstraction layer built on top of WordPress.
Since it looks like a custom way of interacting with WordPress content, I’d recommend reaching out to the Thesis community. From the website homepage, it looks like whoever purchased the Focus theme (the original developer? the site owner?) should have a login for that forum:
Once you become a Focus customer, you’ll gain access to the DIYthemes forums and an entire community of people who are focused on getting the most out of their websites.
– https://diythemes.com/