--- a/Helpviewer/History/HistoryMenu.py	Sun Jan 12 18:02:33 2014 +0100
+++ b/Helpviewer/History/HistoryMenu.py	Sun Jan 12 18:31:15 2014 +0100
@@ -365,7 +365,6 @@
         """
         from .HistoryDialog import HistoryDialog
         dlg = HistoryDialog(self)
-        dlg.setAttribute(Qt.WA_DeleteOnClose)
         dlg.newUrl.connect(self.newUrl)
         dlg.openUrl.connect(self.openUrl)
         dlg.show()