Program: 81138
Project: 81138
Buggy source:
/** 
 * Downloads the latest JAR file from the Dropbox server. Note that this automatically closes the program once finished. Also note that once this is run, the program WILL eventually close, either through finishing the update or failing to properly update.
 */
private static void updateProgram(){
  try {
    URLConnection conn=updateURL.openConnection();
    InputStream is=conn.getInputStream();
    long max=conn.getContentLength();
    System.out.println("String_Node_Str" + max + "String_Node_Str");
    BufferedOutputStream fOut=new BufferedOutputStream(new FileOutputStream(new File(PAXChecker.class.getProtectionDomain().getCodeSource().getLocation().toURI().getPath())));
    byte[] buffer=new byte[32 * 1024];
    int bytesRead=0;
    int in=0;
    int prevPercent=0;
    while ((bytesRead=is.read(buffer)) != -1) {
      in+=bytesRead;
      fOut.write(buffer,0,bytesRead);
      if ((int)(((in * 100) / max)) != prevPercent) {
        prevPercent=(int)(((in * 100) / max));
        update.updateProgress(prevPercent);
      }
    }
    fOut.flush();
    fOut.close();
    is.close();
    System.out.println("String_Node_Str");
  }
 catch (  Exception e) {
    System.out.println("String_Node_Str");
    ErrorManagement.showErrorWindow("String_Node_Str","String_Node_Str",e);
    ErrorManagement.fatalError();
  }
}

Fixed version (ground truth):
/** 
 * Downloads the latest JAR file from the Dropbox server. Note that this automatically closes the program once finished. Also note that once this is run, the program WILL eventually close, either through finishing the update or failing to properly update.
 */
private static void updateProgram(){
  try {
    URLConnection conn=updateURL.openConnection();
    InputStream inputStream=conn.getInputStream();
    long remoteFileSize=conn.getContentLength();
    System.out.println("String_Node_Str" + remoteFileSize + "String_Node_Str");
    String path=PAXChecker.class.getProtectionDomain().getCodeSource().getLocation().toURI().getPath();
    BufferedOutputStream buffOutputStream=new BufferedOutputStream(new FileOutputStream(new File(path.substring(0,path.lastIndexOf("String_Node_Str")) + "String_Node_Str")));
    byte[] buffer=new byte[32 * 1024];
    int bytesRead=0;
    int in=0;
    int prevPercent=0;
    while ((bytesRead=inputStream.read(buffer)) != -1) {
      in+=bytesRead;
      buffOutputStream.write(buffer,0,bytesRead);
      if ((int)(((in * 100) / remoteFileSize)) != prevPercent) {
        prevPercent=(int)(((in * 100) / remoteFileSize));
        update.updateProgress(prevPercent);
      }
    }
    buffOutputStream.flush();
    buffOutputStream.close();
    inputStream.close();
    update.setStatusLabelText("String_Node_Str");
    try {
      File inputFile=new File(path.substring(0,path.lastIndexOf("String_Node_Str")) + "String_Node_Str");
      InputStream fIn=new BufferedInputStream(new FileInputStream(inputFile));
      File outputFile=new File(path);
      buffOutputStream=new BufferedOutputStream(new FileOutputStream(outputFile));
      buffer=new byte[32 * 1024];
      bytesRead=0;
      in=0;
      while ((bytesRead=fIn.read(buffer)) != -1) {
        in+=bytesRead;
        buffOutputStream.write(buffer,0,bytesRead);
      }
      buffOutputStream.flush();
      buffOutputStream.close();
      fIn.close();
      inputFile.delete();
    }
 catch (    Exception e) {
      ErrorManagement.showErrorWindow("String_Node_Str","String_Node_Str",e);
      ErrorManagement.fatalError();
    }
    System.out.println("String_Node_Str");
    try {
      ProcessBuilder pb=new ProcessBuilder(System.getProperty("String_Node_Str") + "String_Node_Str","String_Node_Str",new File(path).getAbsolutePath());
      Process p=pb.start();
    }
 catch (    Exception e) {
      System.out.println("String_Node_Str");
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
    System.out.println("String_Node_Str");
    ErrorManagement.showErrorWindow("String_Node_Str","String_Node_Str",e);
    ErrorManagement.fatalError();
  }
}