diff --git a/module/install/lang/de.php b/module/install/lang/de.php
index 5d7525bf5d..b8b7a28096 100644
--- a/module/install/lang/de.php
+++ b/module/install/lang/de.php
@@ -33,7 +33,7 @@ $lang->install->links = <<<EOT
 ZenTao ALM wurde entwickelt von <strong><a href='http://easysoft.ltd' target='_blank' class='text-danger'>Nature Easy Soft Co., LTD</a></strong>.
 Offizielle Website : <a href='http://www.zentao.pm' target='_blank'>http://www.zentao.pm</a>
 Technischer Support : <a href='http://www.zentao.pm/forum/' target='_blank'>http://www.zentao.pm/forum/</a>
-LinkedIn Group: <a href='https://www.linkedin.com/groups/10330509/' target='_blank'>ZenTao Project Management Software</a>
+LinkedIn:e<a href='https://www.linkedin.com/company/1156596/' target='_blank'>Nature Easy Soft</a>
 Facebook: <a href='https://www.facebook.com/natureeasysoft' target='_blank'>Nature Easy Soft</a>
 Twitter: <a href='https://twitter.com/ZentaoA' target='_blank'>ZenTao ALM</a>
 
diff --git a/module/install/lang/en.php b/module/install/lang/en.php
index c7b87425dc..ae1cedde29 100644
--- a/module/install/lang/en.php
+++ b/module/install/lang/en.php
@@ -33,7 +33,7 @@ $lang->install->links = <<<EOT
 ZenTao ALM is developed by <strong><a href='http://en.easysoft.ltd' target='_blank' class='text-danger'>Nature Easy Soft Co., LTD</a></strong>.
 Official Website: <a href='https://www.zentao.pm' target='_blank'>https://www.zentao.pm</a>
 Technical Support: <a href='https://www.zentao.pm/forum/' target='_blank'>https://www.zentao.pm/forum/</a>
-LinkedIn Group: <a href='https://www.linkedin.com/groups/10330509/' target='_blank'>ZenTao Project Management Software</a>
+LinkedIn: <a href='https://www.linkedin.com/company/1156596/' target='_blank'>Nature Easy Soft</a>
 Facebook: <a href='https://www.facebook.com/natureeasysoft' target='_blank'>Nature Easy Soft</a>
 Twitter: <a href='https://twitter.com/ZentaoA' target='_blank'>ZenTao ALM</a>
 
diff --git a/module/install/lang/fr.php b/module/install/lang/fr.php
index 7d4e3a0eb2..3ddb3f3a48 100644
--- a/module/install/lang/fr.php
+++ b/module/install/lang/fr.php
@@ -33,7 +33,7 @@ $lang->install->links = <<<EOT
 ZenTao ALM is developed by <strong><a href='http://easysoft.ltd' target='_blank' class='text-danger'>Nature Easy Soft Co., LTD</a></strong>.
 Official Website: <a href='https://www.zentao.pm' target='_blank'>https://www.zentao.pm</a>
 Technical Support: <a href='https://www.zentao.pm/forum/' target='_blank'>https://www.zentao.pm/forum/</a>
-LinkedIn Group: <a href='https://www.linkedin.com/groups/10330509/' target='_blank'>ZenTao Project Management Software</a>
+LinkedIn: <a href='https://www.linkedin.com/company/1156596/' target='_blank'>Nature Easy Soft</a> 
 Facebook: <a href='https://www.facebook.com/natureeasysoft' target='_blank'>Nature Easy Soft</a>
 Twitter: <a href='https://twitter.com/ZentaoA' target='_blank'>ZenTao ALM</a>
 
diff --git a/www/upgrade.php.tmp b/www/upgrade.php.tmp
deleted file mode 100644
index 13abaab89e..0000000000
--- a/www/upgrade.php.tmp
+++ /dev/null
@@ -1,64 +0,0 @@
-<?php
-/**
- * The upgrade router file of ZenTaoPMS.
- *
- * @copyright   Copyright 2009-2015 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
- * @license     ZPL (http://zpl.pub/page/zplv12.html)
- * @author      Chunsheng Wang <chunsheng@cnezsoft.com>
- * @package     ZenTaoPMS
- * @version     $Id: upgrade.php 4677 2013-04-26 06:23:58Z chencongzhi520@gmail.com $
- * @link        http://www.zentao.net
- */
-/* Judge my.php exists or not. */
-define('IN_UPGRADE', true);
-$dbConfig = dirname(dirname(__FILE__)) . '/config/db.php';
-$myConfig = dirname(dirname(__FILE__)) . '/config/my.php';
-if(file_exists($dbConfig))
-{
-    if(file_exists($myConfig))
-    {
-        $myContent = trim(file_get_contents($myConfig));
-        $myContent = str_replace('<?php', '', $myContent);
-    }
-
-    if(!@rename($dbConfig, $myConfig))
-    {
-        $configDir = dirname(dirname(__FILE__)) . '/config/';
-        echo "请执行命令 chmod 777 $configDir 来修改权限，保证禅道在该目录有操作文件权限" . "<br />";
-        echo "Please execute the command 'chmod 777 $configDir' to modify the permissions to ensure that the ZenTao has operating file permissions in this directory";
-        exit;
-    }
-
-    if(!empty($myContent))
-    {
-        $myContent = file_get_contents($myConfig) . "\n" . $myContent;
-        file_put_contents($myConfig, $myContent);
-    }
-}
-if(!file_exists($myConfig)) die(header('location: install.php'));
-
-error_reporting(0);
-
-/* Load the framework. */
-include '../framework/router.class.php';
-include '../framework/control.class.php';
-include '../framework/model.class.php';
-include '../framework/helper.class.php';
-
-/* Instance the app. */
-$app = router::createApp('pms', dirname(dirname(__FILE__)), 'router');
-$common = $app->loadCommon();
-
-/* Reset the config params to make sure the install program will be lauched. */
-$config->set('requestType', 'GET');
-$config->set('default.module', 'upgrade');
-$app->setDebug();
-
-/* Check the installed version is the latest or not. */
-$config->installedVersion = $common->loadModel('setting')->getVersion();
-if(($config->version{0} == $config->installedVersion{0} or (is_numeric($config->version{0}) and is_numeric($config->installedVersion{0}))) and version_compare($config->version, $config->installedVersion) <= 0) die(header('location: index.php'));
-
-/* Run it. */
-$app->parseRequest();
-$common->checkUpgradeStatus();
-$app->loadModule();