diff --git a/src/main/java/info/istlab/IoTP/FolderSelector.java b/src/main/java/info/istlab/IoTP/FolderSelector.java
index 8c41c3c..a66873d 100644
--- a/src/main/java/info/istlab/IoTP/FolderSelector.java
+++ b/src/main/java/info/istlab/IoTP/FolderSelector.java
@@ -92,6 +92,7 @@
         selectedItem = hash.get(e.getActionCommand());
         okClicked = true;
         dispose();
+        dummy.dispose();
         // SerialPort selectedsp = SerialPort.getCommPort(e.getActionCommand());
         // SerialWindow sw = new SerialWindow(selectedsp);
         // SerialWindow.hash.put(selectedsp.getSystemPortName(), sw);