All DTHs written in groovy, stock or custom, will stop working once the transition is complete. Only Edge Drivers (written in Lua) will work on the new platform.
Fortunately There is a community-created Edge Driver now in beta that supports this device. (The Zen31 is actually a rebadged Fibaro unit.)
(EDGE Driver-Mc): Z-Wave Edge Drivers and others with FIBARO devices:
Also, this community FAQ might help. It also includes links to several official announcements on Edge:
FAQ: I have no idea what Edge is. Is that a new developer tool? (2022)