Change Login string to Username.

resources/languages/resources.properties

@@ -266,7 +266,6 @@ service.gui.LEAVE=&Leave
 service.gui.LIMIT_REACHED_FOR_IP=You have too many existing registrations from the local IP address and the {0} server doesn''t allow to open any more of them.
 service.gui.LOADING_ROOMS=Loading rooms...
 service.gui.LOCALLY_ON_HOLD_STATUS=Locally on hold
-service.gui.LOGIN=&Login
 service.gui.LOGIN_NETWORK_ERROR=Unable to log in with account: User name: {0}, Server name: {1}, due to a network failure. Please check your network connection.
 service.gui.LOGIN_GENERAL_ERROR=An error occurred while logging in with account: User name: {0}, Server name: {1}:{2}.
 service.gui.LOGIN_INTERNAL_ERROR=An error occurred while logging in with account: User name: {0}, Server name: {1}. This is most probably an internal application error. Please report the problem to our developers mailing list (dev@jitsi.java.net).
@@ -830,6 +829,7 @@ plugin.rssaccregwizz.CONFIRM_ACCOUNT_REMOVAL=The following RSS feed seems to be
 plugin.rssaccregwizz.CONFIRM_ACCOUNT_REMOVAL_TITLE=Remove RSS feed
 
 # simple accregwizz
+plugin.simpleaccregwizz.LOGIN_USERNAME=Username
 plugin.simpleaccregwizz.INITIAL_ACCOUNT_REGISTRATION=Configure all your favorite protocols in one click.
 plugin.simpleaccregwizz.SIGNUP=Not registered yet?
 plugin.simpleaccregwizz.SPECIAL_SIGNUP=Not registered yet? - Click here to get a new username

src/net/java/sip/communicator/plugin/simpleaccreg/InitialAccountRegistrationFrame.java

@@ -237,7 +237,8 @@ private class AccountRegistrationPanel
         extends JPanel
     {
         private JLabel usernameLabel
-            = new JLabel(Resources.getString("service.gui.LOGIN"));
+            = new JLabel(Resources.getString(
+                "plugin.simpleaccregwizz.LOGIN_USERNAME"));
 
         private JLabel passwordLabel
             = new JLabel(Resources.getString("service.gui.PASSWORD"));