These are steps that I followed and it seems that I missed something :
I would check the Z-Wave SJ add-on and HA logs for any errors.
Thanks. I removed the Zooz USB as well as the Zwave integration and ordered the new Zooz 800 USB, and then will try again. The one I used had been on a different hub (Universal Devices Polisy) whiuch was upgraded to a ZMatter dongle. Maybe I did not succeed the factory reset.