Let me quote here relevant post :
Just this doesn’t seems to be right - when Z-Stick is added as secondary controller, you can do OTA firmware updates and the current devices should remain untouched… just testing 
Update is done via PC Contoller SW - below screen when updating Request firmware update for Home Energy Meter Gen5 : Aeotec Help Desk
Seems that even some additional troubleshooting can be performed with this software…
…node 140 is Aeotec ZWave repeater, the visualization is quite nice…
You can even test signal between nodes… and many many other things.
A pity Fibaro can’t be updated via this tool (unless firmware files will be available)
update unfortunately I was not able to make the firmware update for my Home Energy Meter Gen5 while included in the Homey network, even I replicated S0 keys to the PC Controller (communication was fine but the OTA never started) but I must appreciate again Aeotec and Chris, who was providing support and assistance again in fantastic way - I really did not expect to have feedback 5 min after I send out the question.
