Index: trunk/BNC/bncwindow.cpp
===================================================================
--- trunk/BNC/bncwindow.cpp	(revision 3795)
+++ trunk/BNC/bncwindow.cpp	(revision 3796)
@@ -2149,8 +2149,10 @@
 
   if (sender() == 0 || sender() == _teqcActionComboBox) {
+    enable = !_teqcActionComboBox->currentText().isEmpty();
     bool enable10 = _teqcActionComboBox->currentText() == "Edit";
-    enableWidget(enable10, _teqcEditOptionButton);
-    enableWidget(!enable10, _teqcNavFileChooser);
-    enableWidget(!enable10, _teqcOutLineEdit);
+    enableWidget(enable &&  enable10, _teqcEditOptionButton);
+    enableWidget(enable,              _teqcObsFileChooser);
+    enableWidget(enable && !enable10, _teqcNavFileChooser);
+    enableWidget(enable && !enable10, _teqcOutLineEdit);
   }
 }