I've just upgraded a new SG-200-26P to firmware 184.108.40.206 and language version to 220.127.116.11.
Boot version is still in 18.104.22.168 (file size : 393,232 octets)
I've got the sx200_boot-13506.rfb but none of Firmware Image & Language File accept this file in the Upgrade/Backup Firmware/Language section.
Copy : Illegal software format
Copy : not a localization file format.
What should I do ?
Check out this thread:
FYI, I did this last night using the TFTP version of SolarWinds server.