xFi log out? change device names?

Having trouble with the xFi app. I want to change the name of some devices to match what they are named in the 10.0.0.1 utility and in the xFinMobile app. But for some reason the name change won't take. I thought it could be I'm not signed in with the right user but I can't find how to log out of the xFi app. Any suggestions?