Who is managing Calibre to keep the drivers up-to-date with the current firmware? Has this been done? Someone posted today that the current Calibre (6.15.1) is getting the unsupported firmware message with 4.35.20400.
https://www.mobileread.com/forums/sh...77#post4315977
https://www.mobileread.com/forums/sh...77#post4315977