Thanks Rick for the info and MDM software link. Updated my ID41 card relatively easily and quickly. Continue to not hold my breath for MQA in even 2 channels or a dedicated full channel "ID42" version.

FWIW for Mac users: I use a Mac (10.15.3) with Parallels (Version 15.1.2 (47123)) and had to create a "Host-only Network" connection otherwise MDM did not communicate with any of my Meridan endpoints. I normally use the recommended Shared Network option. In working out why MDM did not see my endpoints (ID41 + MC600 endpoints), I turned off the Windows (Win 10) Defender Firewall and my Mac anti-virus software and firewall - that made no difference. So connected my MBP to via ethernet cable and created a Host-Only Network rather than a Shared Network (via wifi connection). MDM recognised endpoints and as advertised auto updated firmware. Once the firmware update finished, I switched the firewalls and anti-virus apps back on and MDM continued to communicate with my endpoints. Strange that the Parallels network connection type is a problem - or at least for me.

Z0: 861v8+ID41+Roon on a QNAP, Naim NAP300, Sonus Faber Amati Anniversario

Z1: Arcam AVR-450, Oppo BDP-103D, SkyQ, Apple TV, Kuro KRP-600A, Sonus Faber Guarneri Memento & Cremona Center M speakers, Martin Logan Descent-i Sub, 2 B&W wall speakers

Z2-6: Roon controlling MC600 Zones into Parasound amps to B&W ceiling speakers