diff --git a/pom.xml b/pom.xml
index 7aa2f63..4cc034c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <groupId>info.istlab.IoTP</groupId>
   <artifactId>IoTP</artifactId>
   <packaging>jar</packaging>
-  <version>0.38</version>
+  <version>0.39</version>
   <name>IoTP</name>
   <url>http://maven.apache.org</url>
 
diff --git a/src/main/java/info/istlab/IoTP/Launcher.java b/src/main/java/info/istlab/IoTP/Launcher.java
index 8f42fd0..9e89631 100644
--- a/src/main/java/info/istlab/IoTP/Launcher.java
+++ b/src/main/java/info/istlab/IoTP/Launcher.java
@@ -28,7 +28,7 @@
 public class Launcher extends JFrame implements MouseInputListener, KeyListener, Runnable {
 
     public static Launcher theapp;
-    public static String version = "0.38";
+    public static String version = "0.39";
     static int reboot_msec = 2000;
     // JPanel mainP;
     File root;
@@ -40,7 +40,7 @@
     public static ArrayList<Process> allProcs = new ArrayList<Process>();
 
     public Launcher(File _root) {
-        super("IoTP Launcher v" + version);
+        super("IoTP v" + version);
         setDefaultCloseOperation(EXIT_ON_CLOSE);
         // mainP = new JPanel();
         file2editor = new Hashtable<File, Editor>();
@@ -412,7 +412,7 @@
     }
 
     public void updateTitle(String string) {
-        setTitle("IoTP Launcher v" + version + " "+string); 
+        setTitle("IoTP v" + version + " "+string); 
     }
 
 
diff --git a/src/main/java/info/istlab/IoTP/SerialChecker.java b/src/main/java/info/istlab/IoTP/SerialChecker.java
index 8f64154..64c6b34 100644
--- a/src/main/java/info/istlab/IoTP/SerialChecker.java
+++ b/src/main/java/info/istlab/IoTP/SerialChecker.java
@@ -56,7 +56,7 @@
                 for(String s: sep){ //過去の接続リスト
                     if (currentHash.get(s) == null){
                         SerialWindow deadWin = SerialWindow.hash.get(s);
-                        deadWin.disposeWin();
+                        if (deadWin != null) deadWin.disposeWin();
                     }
                 }
                 // SerialWindow.closeAll("切断されました");