diff --git a/pom.xml b/pom.xml
index 686673f..da02e5f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <groupId>istlab.KisoJikkenNWP</groupId>
   <artifactId>KisoJikkenNWP</artifactId>
   <packaging>jar</packaging>
-  <version>0.5</version>
+  <version>0.6</version>
   <name>KisoJikkenNWP</name>
   <url>http://maven.apache.org</url>
 
@@ -35,6 +35,12 @@
       <artifactId>autocomplete</artifactId>
       <version>3.2.0</version>
     </dependency>
+    <!-- https://mvnrepository.com/artifact/io.github.java-diff-utils/java-diff-utils -->
+    <dependency>
+      <groupId>io.github.java-diff-utils</groupId>
+      <artifactId>java-diff-utils</artifactId>
+      <version>4.12</version>
+    </dependency>
     <!-- <dependency>
       <groupId>com.googlecode.lanterna</groupId>
       <artifactId>lanterna</artifactId>
diff --git a/src/main/java/istlab/KisoJikken/App.java b/src/main/java/istlab/KisoJikken/App.java
index c11cdf4..1ce5d44 100644
--- a/src/main/java/istlab/KisoJikken/App.java
+++ b/src/main/java/istlab/KisoJikken/App.java
@@ -21,8 +21,22 @@
     public static void main(String[] args) {
         // ファイルがあるかチェック
         userhome = System.getProperty("user.home");
+        getNWPifnotexist(false);
+
+        SwingUtilities.invokeLater(() -> {
+            try {
+                String laf = UIManager.getSystemLookAndFeelClassName();
+                UIManager.setLookAndFeel(laf);
+            } catch (Exception e) {
+                /* Never happens */ }
+            new Launcher(args).setVisible(true);
+        });
+
+    }
+
+    public static void getNWPifnotexist(boolean showMessageIfExist){
         if (Files.notExists(Paths.get(userhome + nwpsrc))) {
-            int res = JOptionPane.showConfirmDialog(null, "NWP実験用のファイルが " + userhome + nwpsrc + " にありません。ダウンロードしますか？");
+            int res = JOptionPane.showConfirmDialog(Launcher.theapp, "NWP実験用のファイルが " + userhome + nwpsrc + " にありません。ダウンロードしますか？");
             if (res == JOptionPane.YES_OPTION) {
                 System.out.println("cd ; git clone "+gitrepos+" を実行。");
                 ProcessBuilder processBuilder = new ProcessBuilder("git", "clone", gitrepos);
@@ -39,16 +53,8 @@
                 System.out.println("cd ; git clone "+gitrepos+" を実行してください。");
                 System.exit(0);
             }
+        } else {
+            if (showMessageIfExist) JOptionPane.showMessageDialog(Launcher.theapp, "NWP実験用のファイルが " + userhome + nwpsrc + " にすでにあるため、ダウンロードをキャンセルしました。");
         }
-
-        SwingUtilities.invokeLater(() -> {
-            try {
-                String laf = UIManager.getSystemLookAndFeelClassName();
-                UIManager.setLookAndFeel(laf);
-            } catch (Exception e) {
-                /* Never happens */ }
-            new Launcher(args).setVisible(true);
-        });
-
     }
 }
diff --git a/src/main/java/istlab/KisoJikken/CommandRunner.java b/src/main/java/istlab/KisoJikken/CommandRunner.java
index dfb6acf..a7d5313 100644
--- a/src/main/java/istlab/KisoJikken/CommandRunner.java
+++ b/src/main/java/istlab/KisoJikken/CommandRunner.java
@@ -11,9 +11,21 @@
     Thread thread;
     Process process;
     // JButton runB;
+    String workingDir;
 
     public CommandRunner(String cmd) {
         command = cmd;
+        workingDir = App.userhome + App.nwpsrc;
+        // runB = rB;
+    }
+
+    public CommandRunner(String cmd, String chdir) {
+        command = cmd;
+        if (chdir==null){
+            workingDir = App.userhome + App.nwpsrc;
+        } else {
+            workingDir = chdir;
+        }
         // runB = rB;
     }
 
@@ -36,12 +48,16 @@
         List<String> cmds = Arrays.asList(command.split(" "));
         ProcessBuilder processBuilder = new ProcessBuilder(cmds);
         // ProcessBuilder processBuilder = new ProcessBuilder("pwd");
-        processBuilder.directory(new File(App.userhome + App.nwpsrc));
+        processBuilder.directory(new File(workingDir));
         // processBuilder.inheritIO();
         JTAConsole con = new JTAConsole("(Exec) " + command);
         con.Systemoutprintln("== 実行開始 ==");
-        con.Systemoutprintln("> cd ~" + App.nwpsrc);
-        con.Systemoutprintln("> "+command);
+        if (workingDir.equals(App.userhome + App.nwpsrc)) {
+            con.Systemoutprintln("> cd ~" + App.nwpsrc);
+        } else {
+            con.Systemoutprintln("> cd " + workingDir);
+        }
+        con.Systemoutprintln("> " + command);
 
         try {
             process = processBuilder.start();
diff --git a/src/main/java/istlab/KisoJikken/FileTreeModel.java b/src/main/java/istlab/KisoJikken/FileTreeModel.java
new file mode 100644
index 0000000..ef9b4ed
--- /dev/null
+++ b/src/main/java/istlab/KisoJikken/FileTreeModel.java
@@ -0,0 +1,100 @@
+package istlab.KisoJikken;
+
+import java.io.File;
+import java.util.Arrays;
+
+import javax.swing.event.TreeModelListener;
+import javax.swing.tree.TreeModel;
+import javax.swing.tree.TreePath;
+
+class MyFile extends File {
+    public MyFile(String pathname) {
+        super(pathname);
+    }
+
+    public String toString() {
+        return super.toString().replaceAll(App.userhome, "~");
+    }
+}
+
+
+public class FileTreeModel implements TreeModel {
+
+    // We specify the root directory when we create the model.
+    protected File root;
+    boolean isExcludeClassFiles = false;
+
+    public FileTreeModel(File root, boolean exCls) {
+        this.root = root;
+        isExcludeClassFiles = exCls;
+    }
+
+    // The model knows how to return the root object of the tree
+    public Object getRoot() {
+        return root;
+    }
+
+    // Tell JTree whether an object in the tree is a leaf or not
+    public boolean isLeaf(Object node) {
+        return ((File) node).isFile();
+    }
+
+    private File[] getChildFiles(File parent) {
+        if (isExcludeClassFiles) {
+            return parent.listFiles(path -> !path.toString().endsWith(".class"));
+        } else {
+            return parent.listFiles();
+        }
+    }
+
+    // Tell JTree how many children a node has
+    public int getChildCount(Object parent) {
+        File[] children = getChildFiles((File) parent);
+        if (children == null)
+            return 0;
+        return children.length;
+    }
+
+    // Fetch any numbered child of a node for the JTree.
+    // Our model returns File objects for all nodes in the tree. The
+    // JTree displays these by calling the File.toString() method.
+    public Object getChild(Object parent, int index) {
+        File[] children = getChildFiles((File) parent);
+        // String[] children = ((File) parent).list();
+        Arrays.sort(children);
+        if ((children == null) || (index >= children.length))
+            return null;
+        // return new File((File) parent, children[index]);
+        return new MyFile(children[index].getAbsolutePath());
+    }
+
+    // Figure out a child's position in its parent node.
+    public int getIndexOfChild(Object parent, Object child) {
+        File[] children = getChildFiles((File) parent);
+        // String[] children = ((File) parent).list();
+        Arrays.sort(children);
+        if (children == null)
+            return -1;
+        String childname = ((File) child).getName();
+        // if (childname.startsWith(".")) return -1;
+        for (int i = 0; i < children.length; i++) {
+            if (childname.equals(children[i].getName()))
+                return i;
+        }
+        return -1;
+    }
+
+    // This method is only invoked by the JTree for editable trees.
+    // This TreeModel does not allow editing, so we do not implement
+    // this method. The JTree editable property is false by default.
+    public void valueForPathChanged(TreePath path, Object newvalue) {
+    }
+
+    // Since this is not an editable tree model, we never fire any events,
+    // so we don't actually have to keep track of interested listeners.
+    public void addTreeModelListener(TreeModelListener l) {
+    }
+
+    public void removeTreeModelListener(TreeModelListener l) {
+    }
+}
diff --git a/src/main/java/istlab/KisoJikken/Launcher.java b/src/main/java/istlab/KisoJikken/Launcher.java
index 517dd65..a3f7a75 100644
--- a/src/main/java/istlab/KisoJikken/Launcher.java
+++ b/src/main/java/istlab/KisoJikken/Launcher.java
@@ -21,8 +21,9 @@
 import java.nio.file.Paths;
 import java.security.CodeSource;
 import java.security.ProtectionDomain;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
-import java.util.Arrays;
+import java.util.Date;
 import java.util.Enumeration;
 import java.util.Hashtable;
 
@@ -35,14 +36,12 @@
 import javax.swing.JScrollPane;
 import javax.swing.JTree;
 import javax.swing.event.MouseInputListener;
-import javax.swing.event.TreeModelListener;
-import javax.swing.tree.TreeModel;
 import javax.swing.tree.TreePath;
 
 public class Launcher extends JFrame implements MouseInputListener, KeyListener {
 
     public static Launcher theapp;
-    public static String version = "0.5";
+    public static String version = "0.6";
     public static String downloadurl = "https://cit.istlab.info/KisoJikkenNWP/target/";
     public static Path execPath;
     // JPanel mainP;
@@ -92,7 +91,7 @@
 
         // Menu
         JMenuBar menuBar = new JMenuBar();
-        JMenu menu = new JMenu("App");
+        JMenu menu = new JMenu("App"); /**************************************************** */
         menuBar.add(menu);
         JMenuItem mi = new JMenuItem("show version");
         mi.addActionListener(ae -> JOptionPane.showMessageDialog(this, "Kiso NWP Launcher v" + version));
@@ -114,18 +113,29 @@
         mi.addActionListener(ae -> System.exit(0));
         menu.add(mi);
 
-        menu = new JMenu("File");
+        menu = new JMenu("File");       /**************************************************** */
         menuBar.add(menu);
 
-        jcbmi = new JCheckBoxMenuItem("exclude class files");
+        jcbmi = new JCheckBoxMenuItem("exclude class files from filetree");
         jcbmi.addItemListener(ae -> reloadFiles());
         menu.add(jcbmi);
 
-        mi = new JMenuItem("reload folders/files");
+        mi = new JMenuItem("reload filetree");
         mi.addActionListener(ae -> reloadFiles());
         menu.add(mi);
 
-        menu = new JMenu("Process");
+        menu.addSeparator();
+
+        mi = new JMenuItem("rename/delete NWP folder");
+        mi.addActionListener(ae -> renameOrDeleteNWPFolder());
+        menu.add(mi);
+
+        mi = new JMenuItem("get NWP folder");
+        mi.addActionListener(ae -> App.getNWPifnotexist(true));
+        menu.add(mi);
+
+
+        menu = new JMenu("Process");       /**************************************************** */
         menuBar.add(menu);
 
         mi = new JMenuItem("stop alive");
@@ -137,11 +147,11 @@
         menu.add(mi);
 
         mi = new JMenuItem("jps");
-        mi.addActionListener(ae -> runCommand(ae.getActionCommand()));
+        mi.addActionListener(ae -> runCommand(ae.getActionCommand(), null));
         menu.add(mi);
 
         mi = new JMenuItem("killall java");
-        mi.addActionListener(ae -> runCommand(ae.getActionCommand()));
+        mi.addActionListener(ae -> runCommand(ae.getActionCommand(), null));
         menu.add(mi);
 
         setJMenuBar(menuBar);
@@ -150,9 +160,20 @@
         setSize(400, 600);
     }
 
-    public void runCommand(String cmd) {
+    public void renameOrDeleteNWPFolder(){
+        int res = JOptionPane.showConfirmDialog(this, "NWPフォルダを削除するなら「いいえ」、『NWP_日付_時刻』にフォルダ名を変更するなら「はい」を押してください。");
+        if (res==JOptionPane.YES_OPTION){
+            SimpleDateFormat sdf = new SimpleDateFormat("yyMMdd_HHmm");
+            runCommand("mv NWP NWP_"+sdf.format(new Date()), App.userhome);
+            reloadFiles();
+        } else if (res==JOptionPane.NO_OPTION){
+            runCommand("rm -fr ~/NWP", App.userhome);
+            reloadFiles();
+        }
+    }
+    public void runCommand(String cmd, String chdir) {
         System.out.println(cmd);
-        new CommandRunner(cmd).startstop();
+        new CommandRunner(cmd, chdir).startstop();
     }
 
     public void stopProcess(boolean isAll) {
@@ -353,97 +374,3 @@
 
 }
 
-class MyFile extends File {
-    public MyFile(String pathname) {
-        super(pathname);
-    }
-
-    public String toString() {
-        return super.toString().replaceAll(App.userhome, "~");
-    }
-}
-
-/**
- * The methods in this class allow the JTree component to traverse
- * the file system tree, and display the files and directories.
- **/
-class FileTreeModel implements TreeModel {
-
-    // We specify the root directory when we create the model.
-    protected File root;
-    boolean isExcludeClassFiles = false;
-
-    public FileTreeModel(File root, boolean exCls) {
-        this.root = root;
-        isExcludeClassFiles = exCls;
-    }
-
-    // The model knows how to return the root object of the tree
-    public Object getRoot() {
-        return root;
-    }
-
-    // Tell JTree whether an object in the tree is a leaf or not
-    public boolean isLeaf(Object node) {
-        return ((File) node).isFile();
-    }
-
-    private File[] getChildFiles(File parent) {
-        if (isExcludeClassFiles) {
-            return parent.listFiles(path -> !path.toString().endsWith(".class"));
-        } else {
-            return parent.listFiles();
-        }
-    }
-
-    // Tell JTree how many children a node has
-    public int getChildCount(Object parent) {
-        File[] children = getChildFiles((File) parent);
-        if (children == null)
-            return 0;
-        return children.length;
-    }
-
-    // Fetch any numbered child of a node for the JTree.
-    // Our model returns File objects for all nodes in the tree. The
-    // JTree displays these by calling the File.toString() method.
-    public Object getChild(Object parent, int index) {
-        File[] children = getChildFiles((File) parent);
-        // String[] children = ((File) parent).list();
-        Arrays.sort(children);
-        if ((children == null) || (index >= children.length))
-            return null;
-        // return new File((File) parent, children[index]);
-        return new MyFile(children[index].getAbsolutePath());
-    }
-
-    // Figure out a child's position in its parent node.
-    public int getIndexOfChild(Object parent, Object child) {
-        File[] children = getChildFiles((File) parent);
-        // String[] children = ((File) parent).list();
-        Arrays.sort(children);
-        if (children == null)
-            return -1;
-        String childname = ((File) child).getName();
-        // if (childname.startsWith(".")) return -1;
-        for (int i = 0; i < children.length; i++) {
-            if (childname.equals(children[i].getName()))
-                return i;
-        }
-        return -1;
-    }
-
-    // This method is only invoked by the JTree for editable trees.
-    // This TreeModel does not allow editing, so we do not implement
-    // this method. The JTree editable property is false by default.
-    public void valueForPathChanged(TreePath path, Object newvalue) {
-    }
-
-    // Since this is not an editable tree model, we never fire any events,
-    // so we don't actually have to keep track of interested listeners.
-    public void addTreeModelListener(TreeModelListener l) {
-    }
-
-    public void removeTreeModelListener(TreeModelListener l) {
-    }
-}
\ No newline at end of file