flying snow wrote hi empee, have you tried this beta utility? http://static.tp-link.com/beta_PowerlineUtility.zip @phone UK50, on the tplink website, there is powerline scan utility for windows, try...

Have what appears to be exactly the same problem. Purchased the AV600 (TL-WPA4220) kit today and trying to set up a name and password for the WiFi unit. Downloaded the relevant utility for V1.02...