@David-TP I did try that but as I said: it is on that page (tplinkdeco.net) impossible to choose only my main router unit. I can only choose between x50 and x50-outdoor. I suspect that when I choose...

@David-TP I get a "firmware update failed" message when I try to update the firmware. I have 4 Deco X50 units, 2x a 1.2 version, 1 (the main router) v1 and 1 x50-outdoor. On the web page to update...