The update should be available for Z2M and Hubitat users. This version has been tested by several people with good results, but I still recommend that you update one device configuration (ie smart bulb mode, 3-way dumb, 3-way aux, different load types, etc.) at a time and test the functionality that you use before proceeding. There are a few isolated reports of bulb compatibility and a new one about extra reports when using scenes? Blue 2-1 On / Up Behavior (Firmware related?) - Switches / Firmware Discussion - Inovelli Community)
This version makes leading edge the default dimming type (like it was before 2.11). So, if your load is compatible and you want to try trailing edge you can do the button combo of “hold down button then press the config button 13x”. Please only do this if you are using compatible bulbs and are having flickering or other issues. Reach out to us if you need to know if your load is compatible.
@mathd please try this procedure to show the correct version: Blue Series 2-1 Firmware Changelog | VZM31-SN - Switches / Firmware Discussion - Inovelli Community
If you have ZHA and would like to try the update please let me know. I can share the update instructions with you.