hide the label that shows up on regression testing

EduNetworkBuilder/ListBoxWindow.cs

@@ -138,6 +138,7 @@ namespace EduNetworkBuilder
                 //Regression testing.  Similar to listing all the puzzles.
                 Text = NB.Translate("LBW_Regression_Testing"); //Regression Testing
                                                                //
+                lblInstructions.Text = "";
                 UpdateForm();
                 CheckBox newCB;
                 int count = 0;