--- a/MiniDebugger.st	Mon Jun 06 10:37:21 2016 +0100
+++ b/MiniDebugger.st	Mon Jun 06 10:56:12 2016 +0100
@@ -826,6 +826,7 @@
         ^ false
     ].
     (cmd == $Y) ifTrue:[
+        Display := nil.
         Smalltalk openDisplay.
         NewLauncher open.
         ^ true