I have an Airties 4920 mesh extender. This device automatically updated itself (from old FW) to a new build which now disabled ALL the features it had, similar to a typical router. The only options I now have is to view status, change login, and update firmware. This new firmware disabled downgrades, which I was able to do before. See pics linked here.
I am waiting for my USB to serial TTL so I can console into it. Hopefully I can downgrade back to the previous firmware or run OpenWrt.
Thanks in advance for any input.