Switch to side-by-side view

--- a/tool/src/main/core.java
+++ b/tool/src/main/core.java
@@ -17,6 +17,7 @@
 import FileExtension.ExtensionControl;
 import GUI.StudioUI2;
 import GUI.StudioUI3;
+import GUI.StudioUI4;
 import definitions.Messages;
 import definitions.is;
 import java.io.File;
@@ -48,7 +49,7 @@
             temp = new HashMap<String, Object>();
     
     public static StudioUI2 studio2 = null;
-    public static StudioUI3 studio = null;
+    public static StudioUI4 studio = null;
     
     public static utils.KeyStroke key = 
             new utils.KeyStroke(Messages.SearchBoxPressedKey);