Just a note that you need a USB Z-Wave stick in order to fully update the dimmer (LZW31/LZW31-SN), since there are two firmware “targets” (OTZ and BIN files, targets 0 and 1, respectively, in the Z-Wave PC Controller software instructions); the (amazing) Hubitat community tool can only update the first. This is the bulk of the firmware update and I’m not sure that even Inovelli has received clarification from the engineers on how exactly the two parts of the update interact (everything I noticed had been fixed with just the OTZ — it took me a while to update the BIN portion on some, and I’ve seen a ton of people on the Hubitat forums just doing the OTZ portion without issue), but I thought I should mention it.
You don’t have to use the USB stick on your Hubitat hub, though it’s very easy if you do. If you don’t, you can un-pair the dimmer from Hubitat, pair it to the stick, then pair it back to Hubitat after the update — a bit of a pain because you’ll have to re-do all of your automations. A second option is to pair the stick as a secondary controller to Hubitat and then update the firmware using that plus the PC software — a bit easier but does require you to manage to add the stick as a secondary controller (usually pretty easy: NWI and then learn mode from the PC software while Hubitat is in pairing mode) and hope that the update still works when the stick is a secondary (has for me on all but one and I’m not sure why it didn’t there).
But again, lots of people seem to be doing what you have probably finished doing by now (hope it went through!) without problems — just wanted to point it out in case Inovelli does get clarification on where this may matter or if you yourself notice problems.