I can no longer log into my modem in my browser (FF)

for 10.0.0.1, I get "Managing your home network settings is now easier than ever. To manage your gateway settings and other features, please download the Xfinity xFi app."

I assume this means use your app but I have no idea where in the app I can change my wifi 2.5 settings, to 

1 turn it on again

2 set a name

3 set a password.

I spent a lot of time in the app but can't find it.

WHERE PLEASE!!!

EDIT:  ok I tap Wifi (at bottom) tap WIFI details, turned split on, added to 2.5 rugsrugs Easy2025#, saved it, 

but it doesn't show either on phone or computer.

So I power cycled the modem, but still not showing - I need to use this to connect my Roomba iRobot to their app(their directions). (I use 5 to connect my phone since it is much faster.