I spent yesterday afternoon playing around with this, but I could not get it to work fully.
After 3 or 4 tries I managed to 'see' the Z-wave wall switch in HomeGenie, but only after putting the switch and razberry in very close proximity to each other. Getting the Node Information continually gave me a timeout error, I tried switching the Z-wave interface off/on and also reboot the Pi a few times, but it still wouldn't work.
I thought that maybe the razberry antenna was the culprit so I
soldered a new antenna to the Razberry board. But this didn't help, getting Node Information kept giving me a timeout, (sometimes very quickly by the way, I would click 'Get' and the timeout error would appear within half a second.)
On a whim, I opened the 'official' Razberry interface on the Pi, to my surprise the switch and all of its parameters could be seen here, so the Razberry does work. Could it be that the Razberry software is causing a conflict? Do I first have to disable the Razberry software?
Unpairing also seems to work OK from HomeGenie, although it does still give a timeout. Afterward I managed to pair the switch to the Z-stick again and all went well.