B593s22 Multicast Upgrade Toolexe ((link)) -

You cannot perform a multicast upgrade using the 192.168.1.1 web interface. You must use this low-level executable.

The router is successfully downloading the firmware from your PC. b593s22 multicast upgrade toolexe

Why do B593s22 users desperately seek a multicast upgrade? You cannot perform a multicast upgrade using the 192