Fakro z-wave windows?

Does anyone know how to get in touch with the developer of the Fakro app?
The link in the app page seems to be broken
(https://homey.app/en-gb/app/com.fakro.main/Fakro/)

I’m trying to work out how to add windows to Homey, but still have the remote controls/wall switches still work (which by default seem to use their own local z-wave network)