I have a SQ5 and a SQ6 and I couldn’t update to 1.5.10 on either board and I have always used the same flash drives to update my boards. I downloaded the files on my 2019 MBP which was recently upgraded to Sonoma 14.0 and unzipped the file and copied the .bin file to my rout directory of my flash drive formatted in my SQ as always. no image found, so I downloaded the same file on my Windows 10 PC and extracted the file with WinZip and everything worked as normal and upgraded the firmware no problem. Can’t say for certain but it appears that my Mac was corrupting the download when unzipping the file. Who Knows