Hmmm - I downloaded the Win10 drivers, extracted them etc. When I insert my Hubitat stick, Win10 detects and installs 2 devices (HubZ ZigBee Com Port and HubZ Z-Wave Com Port). But Win10 did not install any drivers (which is what I read/expected). So I go into Device Manager and try to Update Driver for the HubZ Z-Wave Com Port device, but it does not find anything compatible in the extracted files. Any suggestions? Maybe there's some other device that gets updated rather than these 2 that I listed?
Tks,
Mike
If I manually run the 64 bit installer, it installs 7 different Models of devices from Silicon Labs:
Silicon Labs CP210x USB to UART Bridge
Silicon Labs Dual CP2105 USB to UART Bridge: Enhanced COM Port
Silicon Labs Dual CP2105 USB to UART Bridge: Standard COM Port
Silicon Labs Quad CP2108 USB to UART Bridge: Interface0
Silicon Labs Quad CP2108 USB to UART Bridge: Interface1
Silicon Labs Quad CP2108 USB to UART Bridge: Interface2
Silicon Labs Quad CP2108 USB to UART Bridge: Interface3
Not sure which one to force Win10 to use for the Hubitat stick?
Ok - success! Here's some addl info for others wanting to do this firmware upgrade:
1- download the appropriate Windows driver for Hubitat stick from link Raidflex listed earlier. In my case the Win10 link...
2 - extract the driver .zip file and run the appropriate installer app. In my case the 64 bit one named CP210xVCPInstaller_x64
3 - although Windows detects the Hubitat stick upon insertion, it does not find/assign any drivers to the 2 devices (listed in earlier post above)
4 - go into Device Manager (must be an admin) and navigate to Other Devices. You should see 2 devices that were added for the Hubitat stick: HubZ ZigBee Com Port and HubZ Z-Wave Com Port. We're interested in the 2nd one with Z-Wave. Rgt-click and choose Update Driver. Then choose Browse my computer..., then choose Let me pick from a list of available drivers on my computer. Navigate down to Ports (COM & LPT), click [Next], in the Manufacturer list find Silicon Labs, and in the Model list highlight Silicon Labs CP210x USB to UART Bridge. Tell it to install it, and ignore any compatibility warnings.
5 - now that Hubitat's stick driver is installed, you can run HomeSeer's Z-Flash utility. Once Z-Flash loads, it will have drop downs in upper left for Interface and Com Port. Choose USB Z-Wave Interface. In my case there was only one option for Com Port (COM3, but yours might be different?). Once those 2 items are selected, there is an [Enable] button just below the Interface selection, click it. That should populate the area titled "Step 2 Device Management" and list the Leviton dimmer. Put a checkmark next to dimmer in that list, then - if all the planets are aligned - you can click on Step 4's [Start Update] button. Note - you might have to first choose the appropriate file in Step 3 Select the Update File. Mine had only one choice - the version 1.20 file...
Another note: I did this on Windows 10 Professional running under Parallels on my iMac. Don't know if the iMac was at fault, but I did have to repeat Step 4 three times before it successfully updated. The first two times it got to almost 80 or 90% done (7 to 8 minutes), then reported "Device reports unable to receive, aborting".
Happy updating 
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Just tried this on 2 different PCs. Forced the driver install, opened Z-Flash, selected the USB stick on Com3, clicked enabled - and nothing populates.
You have to add it to the He network. Go into HE and select discover devices. Then on your stick put it into pairing mode. Then your entire network of devices will show up and you can do whatever you want with it.
Sorry, I should have mentioned that I am using the HE zwave USB stick.
You should see the devices then.
For those that added a Z-Stick as a secondary controller to Hubitat... 2 questions:
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Do you leave it included in the Hubitat network at all times, or do you exclude it when done? If you leave it included, but powered down, does that cause issues?
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To include it as a secondary controller, did you just use the Zensys Tool and put it in learning mode, and then include on Hubitat? Or other?
Thanks.
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I leave it included. Powered down doesn't matter. Secondaries are not expected to be Fixed location in the Mesh.
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I personally use OZWCP for the include, but as luck would have it, I did one using Zensys Tools last week. Yes, you enter Learn on Zensys and then Discover Devices on Hubitat.
I have two hubs and decided to backup the 2nd stick... I had just been updating some Aeon devices and therefore was already in Windows / Zensys Tools. Would have taken a whole 8 mins more to switch to OZWCP 
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Does anyone know where I can find the latest firmware for DZ6HD-1BZ?
I got my zstick added as secondary last night. Pretty simple - thanks!
I didn't have a lot of time to look, but there were a few interesting/unexpected things in the routing info in Zensys that I need to think on... Surprising considering how many zwave plus hard wired devices I have.
I'm not having any zwave issues, so it may be academic, but it is interesting nonetheless.
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Can someone tell me how to join a zwave stick to HE as a secondary controller? I have a zooz S2 stick that I bought to do some firmware updates on the Leviton plugs but I don't know how to get it connected to HE.
You add the Zooz S2 the same as any other ZWave device. The fact that it knows it's a Controller determines that it Joins as a secondary. The process is the same however. Put Hubitat into Discover and then do whatever the Zooz needs to enter Include. Being black, I can't determine from photos if it has a button, don't see one. I can't tell if it has a battery like the Aeon ZStick. You'd need USB power and some software, like OZWCP or Zentools to "push the button" if it doesn't have one. That would make the Zooz process the same as the Nortek UZB, since it too doesn't have battery or button.
Not sure if this will help you.
http://www.support.getzooz.com/kb/article/253-how-to-perform-an-ota-firmware-update-on-zooz-devices/
I wish they just made the FW available for people to consume. Asking for firmware revisions is painful.
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GE really needs to get on board, they are not even providing firmware to companies like Homeseer.
Maybe there aren't any firmware updates NEEDED on the GE devices... All of the devices I have work work no obvious issues...
Apparently there's updated firmware for the older non-Plus GE switches that would make them report status. I called and asked if they would send it to me, they said no. I asked if I could send my devices in and have Jasco flash them, and they said no to that as well.
Yeah, that's kinda lame.
