where this update can be seen? For me there is just a regular update screen
Ps.: found it, you have scroll all the way down
hehe i was surprised from Logitechās kindness to allow the XMPP firmwareā¦i was wrong 
after update i get thisā¦
I am not getting that message after updating to .210 even after syncing my configuration through the desktop application.
Maybe websocket api now is not necessary.
@digitaldan what do you think about?? Should we upgrade to developer firmware 4.15.210 and use the XMPP again? Or wait until websocket api is implemented (by you) and then use official firmware 4.15.206?
For me it would be associated with a lot of effort or would be annoying to connect each time the hub via USB cable to PC getting a new ādeveloper firmwareā version!
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Thx! Saved my day 
Thank you so much for posting! Worked perfectly!
Agreed, upgrading is up to you. I plan on moving to the websocket connection, but I donāt have an ETA on when it will be done. I started last night and so far so good, but I will be completely re-writing our connection library. The good news is that it will be 90% less code, most of the logic was in managing XMPP messaging, much much easier using websockets, so Iām kinda excited to go down that route. Letās hope logitech doesnāt stop this method as well.
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I also found this:
couldnāt find if somebody posted this update (50m ago)
Thanks for your work! And I think this is the āeasiestā way to ensure that Harmony works with OH. This developer fw is temporary I think and as others reported, Logitech will shut down this method in the near futureā¦
Thank you for clarifying this. 
Just installed the newly released developer FW, and OpenHAB is once more in control of my Harmony Hub!
Kudos to Logitech for actually listening to their users. 
Hereās a link to the vulnerabilities that were found by Tenable and fixed by Logitech:
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Hey there =)
First of all: thanks Logitech! u fāed it up really good.
Every time I try to downgrade my harmony hub I get this:
I get this when I try downgrade on the āHarmony Home Controlā Site and on the āFirmware to enable XMPPā Site. I tried this on my desktop and laptop with fresh installs of the Harmony software.
Of course I tried to unplug and retry the process.
Anyone got an idea?
Logitech has now anyway announced they will make an update for giving local access again. Until then, they opened up for a workaround. See here (in German, but somewhere else itās perhaps in English too?)
## Logitech lenkt ein: Nutzer erhalten wieder lokalen Zugriff auf Harmony Hub
You try to upgrade from 4.15.206 to developer Firmware 4.15.210? Itās telling you, itās a downgrade?
Iām still on 4.15.201. And I didnāt upgrade yet.
Maybe you first have to downgrade to a previous version --> 4.15.193 and then upgrade to 4.15.210?
What are the experiences of others, who did an upgrade?
For me it was pretty straight forward. I first updated the MyHarmony Desktop client on Windows 10 and then followed the instructions. Both of my hubs were automatically updated to 206 when I was on holiday. They are now using the developer firmware. No issues so far (using openHAB 1.x).
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Have you tried another USB cable?