Hello, 

I have been having some problems with my Deco and wanted to update their firmware to the latest version. I downladed the update utility and latest firmware version (Deco M9 Plus(US)_V2_1.6.4 Build 20240718) from here: https://www.tp-link.com/us/support/download/deco-m9-plus/

Running the utility it finds all 3 of my units, but only upgrades my sattalies, the main deco that is conected to ethernet is stuck on version 1.2.12. 

I've browsed this forum for answers but everything suggests a Web UI to upgrade but I cannot seem to get to it. What is the solution here, I set one of my other decos that have upgraded as the main deco then try the firmware update again?

Thank you for your help