--- a/MiniDebugger.st	Thu Jun 02 15:27:47 2016 +0200
+++ b/MiniDebugger.st	Thu Jun 02 21:07:19 2016 +0200
@@ -826,6 +826,7 @@
         ^ false
     ].
     (cmd == $Y) ifTrue:[
+        Display := nil.
         Smalltalk openDisplay.
         NewLauncher open.
         ^ true