Good news
Using bcopeland's firmware updater [RELEASE] Z-Wave Firmware Updater, and Mike's parameter tool Super basic Z-Wave parameter tool I was able to:
- Update the ZEN16 firmware to 1.02
- Set relay auto-off to seconds (versus default minutes)
- Continue to use the supported driver (just ignore that it says minutes)
Very happy. Thank you Bryan and Zooz (Agnes and Karen) support (1.02 firmware and updated manual with correct parameter values)