|@StuartS "If it were an easy to discover the WPA key it wouldn't be very secure now would it."|
Well, seeing as you'd need the wireless key to login to the router, OR be on a wired connection, and therefore have physical access to the router, I don't see what would be so insecure about it. Especially given the fact that you have to login with the username and password to get to a page like that.
Regardless, if it's all starred out, you're not getting it. Just change it in the router and change it on all the wireless devices.