All tests have succeeded, many users are running on DSM 6. 🙂
Thank you to all users helping us test.
Note: if Z-wave USB key is not recognized, try putting it in the front port of your Synology instead of the back port.
For DSM 6 the start/stop status is working now as well, you can see it running in the package center.
Note: it only works for new installations, older installations still use the old start/stop script.