Deco network has been down over 24hrs, tried to reboot by unplugging all units - have one main unit and two satellites - which usually works. However this time the main unit maintained a solid red light, and have tried now numerous times. 
Obviously I can't do any kind of reboot or upgrade any firmware on the app as it won't connect. 
I have now tried to reset the main unit by pressing the pin hole button on the bottom of the unit and now it is flashing blue. 
I can't find any way to either remove the unit from the app or add it again after the reset. 
Any suggestions please as it's now starting to get frustrating!! :-D