You can change the settings in the WifiRemote configuration (MediaPortal Configuration -> Plugins -> WifiRemote -> Authentication).I've upgraded to MePo 1.2 beta today and upgraded WifiRemote as well.
Still not able to connect.
I've turned off my firewall and tried with WifiRemote Demo Client from another machine, it says disconnected very quick.
After that I tried with the firewall on, it takes about 15 seconds before it says disconnected (I tried on ip and on hostname).
WifiRemote is configured with the default port (8017) and does not require authentication is that correct.