This firmware really, really doesn't work for me. After the upgrade the first two Quatro4K tuners are no longer available to Windows Media Center. While losing half of the OTA tuners for my DVR is bad enough - the real problem is that I lost the two good ones. All of my testing praising the ability of the Quatro4K to keep channels locked even in the face of multi-path were based on Tuners 0 and 1. After the upgrade I have several channels I can longer keep locked due to the use of Tuner 2.
(Note I am still on WMC due to the lack of full DRM support in the HDHomeRun DVR, as I use a Prime along with a Quatro4K (originally a first generation white HDHomerun, then a Duo, now Quatro4K).
How can I downgrade to the most previous firmware before 20201030? I looked around and can not find a link to the older firmware.