Very interesting topic 
I also have an UZB stick. But I thought so far that you can not backup the stick. I was thinking wrong!
Just to be sure and if I understood everything correctly, here are again your steps:
-
You installed an unlicensed Z-Way (2.3.8) on a Linux machine, because only an outdated version (2.3.3) is available for Windows OS.
-
You installed “Z-Wave PC Controller 5.38” on a Windows machine.
-
To copy a NVM backup (NVM = non-volatile memory) from the primary controller to the secondary controller, you did the following:
- stopp Openhab
- upgrade all controllers to the latest firmware version with Z-Way.
- open Z-Way → http://YourIP:8083/expert
- → Network → Controller Info → Firmware Update
- enter “all” when asked for “access token”. Don’t upgrade to “Bridge” firmware.
-
NVM backup with “Z-Wave PC Controller 5.38”.
-
Restore it to the second, third, etc. controller
.
Now a few questions: Did you save your backup as .zip or .hex?
Did you once try to restore your backup to the same controller again?
If you have only one controller (like me), is it absolutely necessary to update to the latest firmware?
(I could imagine that “backup → restore” to different controllers with different firmware would fail, so better having two controllers with exactly the same firmware…; So I’d better buy another controller.)
Would you like to post a few screenshots here? Thanks a lot!