This is silly. I've made some tl;dr notes here for us and hopefully my dropbox links will work for you guys. My apologies I may have changed the original files names - long story short they were not so intuitive to keep straight the way I found them floating around the PS audio forums. I take no responsibility if you break anything!
- Make sure SD card is freshly formatted FAT32
- Loose files should just go on the "root" of the SD card, not the ZIP files
- MkI owners seem to be able to use the new FW's as well so be a guinea pig!
- Reports of flickering displays, see 2.2.0
SQ / Compatibility?
It sounds like a crapshoot of which version is better compatibility wise or which is better SQwise; the bridge makes things more complicated as well so you may have to "roll" versions to find the one that works for you. I think the majority seems to feel most other versions sound better than 2.1 but that's subjective.
Even PS Audio seems to admit they are not sure why there are SQ differences between some versions!
2.1.0 Seems to be the current mkII shipping FW - Paul's favorite SQ, many listeners tend to disagree
2.0.2 Previous FW version of mkII kit (used by beta testers?)
2.0.2 (6 files version) Previous FW version of mkII kit with some sort of unknown fix added by Alex to help some owners overcome install problems
2.0.3 Same as 2.0.2 but "fixed the de-emphasis flag decoding for the SPDIF inputs" - I think this has to do with the coax input
2.2.0 Implemented a different FW version because they changed LCD manufacturers (more compatible friendly?). Supposedly same as 2.1.0 though some report (positive) SQ differences with 2.2.0. This file was originally in RAR format and I changed it to ZIP format.
2.2.0 From Jazzbug - Supposedly same as 2.2.0 but provided in ZIP format rather than RAR format. I noticed a file is named differently and the dates are different hence I am posting it just in case.