diff --git a/src/net/java/sip/communicator/impl/gui/UIServiceImpl.java b/src/net/java/sip/communicator/impl/gui/UIServiceImpl.java
index 9612adccb..5dd567c53 100644
--- a/src/net/java/sip/communicator/impl/gui/UIServiceImpl.java
+++ b/src/net/java/sip/communicator/impl/gui/UIServiceImpl.java
@@ -138,9 +138,7 @@ void loadApplicationGui()
         // Initialize the single window container if we're in this case. This
         // should be done before initializing the main window, because he'll
         // search for it.
-        if (Boolean.parseBoolean(
-                GuiActivator.getResources().getSettingsString(
-                        "impl.gui.SINGLE_WINDOW_INTERFACE")))
+        if (ConfigurationManager.isSingleWindowInterfaceEnabled())
             singleWindowContainer = new SingleWindowContainer();
 
         // Initialize the main window.
diff --git a/src/net/java/sip/communicator/impl/gui/utils/ConfigurationManager.java b/src/net/java/sip/communicator/impl/gui/utils/ConfigurationManager.java
index 496fe900c..8e5dfc6ae 100644
--- a/src/net/java/sip/communicator/impl/gui/utils/ConfigurationManager.java
+++ b/src/net/java/sip/communicator/impl/gui/utils/ConfigurationManager.java
@@ -243,6 +243,11 @@ public class ConfigurationManager
      */
     private static boolean isChatRoomConfigDisabled = false;
 
+    /**
+     * Indicates if the single window interface is enabled.
+     */
+    private static boolean isSingleWindowInterfaceEnabled = false;
+
     /**
      * The name of the show smileys property.
      */
@@ -261,6 +266,12 @@ public class ConfigurationManager
     private static final String CHAT_ROOM_CONFIG_DISABLED_PROP
         = "net.java.sip.communicator.service.gui.CHAT_ROOM_CONFIG_DISABLED";
 
+    /**
+     * The name of the single interface property.
+     */
+    private static final String SINGLE_WINDOW_INTERFACE_ENABLED
+        = "net.java.sip.communicator.service.gui.SINGLE_WINDOW_INTERFACE_ENABLED";
+
     /**
      * Loads all user interface configurations.
      */
@@ -603,6 +614,25 @@ public static void loadGuiConfigurations()
                 "ADVANCED_CONFIG_DISABLED",
                 isAdvancedConfigDisabled);
 
+        // Single interface enabled property.
+        String singleInterfaceEnabledProp
+            = GuiActivator.getResources().getSettingsString(
+                SINGLE_WINDOW_INTERFACE_ENABLED);
+
+        boolean isEnabled = false;
+
+        if (singleInterfaceEnabledProp != null)
+            isEnabled = Boolean.parseBoolean(singleInterfaceEnabledProp);
+        else
+            isEnabled = Boolean.parseBoolean(
+                GuiActivator.getResources().getSettingsString(
+                "impl.gui.SINGLE_WINDOW_INTERFACE"));
+
+        // Load the advanced account configuration disabled.
+        isSingleWindowInterfaceEnabled
+            = configService.getBoolean( SINGLE_WINDOW_INTERFACE_ENABLED,
+                                        isEnabled);
+
         if(isFontSupportEnabled())
         {
             // Load default font family string.
@@ -1256,6 +1286,31 @@ public static boolean isAutoAnswerDisableSubmenu()
         return autoAnswerDisableSubmenu;
     }
 
+    /**
+     * Indicates if the single interface is enabled.
+     *
+     * @return <tt>true</tt> if the single window interface is enabled,
+     * <tt>false</tt> - otherwise
+     */
+    public static boolean isSingleWindowInterfaceEnabled()
+    {
+        return isSingleWindowInterfaceEnabled;
+    }
+
+    /**
+     * Updates the "singleWindowInterface" property through the
+     * <tt>ConfigurationService</tt>.
+     *
+     * @param singleWindowInterface <code>true</code> to indicate that the
+     * single window interface is enabled, <tt>false</tt> - otherwise
+     */
+    public static void setSingleWindowInterfaceEnabled(boolean isEnabled)
+    {
+        isSingleWindowInterfaceEnabled = isEnabled;
+
+        configService.setProperty(SINGLE_WINDOW_INTERFACE_ENABLED, isEnabled);
+    }
+
     /**
      * Sets the transparency value for all transparent windows.
      * 
@@ -2090,4 +2145,4 @@ public static boolean hasEnabledVideoFormat(
 
         return encodingConfiguration.hasEnabledFormat(MediaType.VIDEO);
     }
-}
+}
\ No newline at end of file