Hi, it doesn't seem possible to switch server on the XB1 app, even though there's drop-down arrow on the upper right corner, suggeting we can do that but nothing happens. the only way is to manually stop the server on the PC I don't wan't to connect to.
Seen as how (let's face it!) there won't be an update for the next several months, this is yet another drag.
Using the drop down menu I don't seem to have a problem switching between my Windows 7 and my FreeBSD server. After hitting the a button it refreshes the main screen and which ever server I picked shows up.
So it does work! Are you using the XB1 controller or a remote? And If controller, which button/trigger/whatever are you pushing to see the server list?