Hi guys!
All what you need to backup & restore your ZWAVE Stick is a PC and my little tool that embeds the ZWAVE . ME ZWave Programmer tool.
Check my earlier reply to this thread, there is a link to my little tool ‘ZWAVE Cloner’:
https://domotic-hobby.com/download/uzb1-cloner
Tested with:
ZWAVE . ME ZME_UZB1 stick, Everspring stick, Aeotec z-stick gen5, Vision ZU1401-5 and Jeedom Smart Zwave controller
Some people even backed up their razberry controller (sorry in french):
The procedure to make a backup or do a restore is documented within the tool… super easy.
I made this tool because it was hard to find out how to use the original backup tools and it is so frustrating not to have a backup of such an important piece of equipment when you need it 
Tip: Don’t forget to test a restore of your backup on ANOTHER usb controller stick.
Thanks,
Sebastien