All designs from Barnabas onward will only be on the new CMS.
We are in the process of moving the Disciple, Antioch, Damascus, Galatian, and Colossian themes from the legacy CMS to the new CMS. So, if you're running one of those themes, we will be in touch soon to schedule your upgrade!
If you're running any other design, please contact us to discuss your design change. Thank you!