diff --git a/nexus/Install/Install.php b/nexus/Install/Install.php
index 16e69a55..634668df 100644
--- a/nexus/Install/Install.php
+++ b/nexus/Install/Install.php
@@ -204,13 +204,32 @@ class Install
         $symbolicLinks = [];
         require $originalConfigFile;
         $settings = require $defaultSettingsFile;
+        $settingsFromDb = [];
+        if (get_row_count('settings') > 0) {
+            $settingsFromDb = get_setting();
+        }
+        $this->doLog("settings form db: " . json_encode($settingsFromDb));
         foreach ($settings as $prefix => &$group) {
             $prefixUpperCase = strtoupper($prefix);
             $oldGroupValues = $$prefixUpperCase ?? null;
             foreach ($group as $key => &$value) {
-                //merge original config to default setting, exclude code part
-                if ($prefix != 'code' && isset($oldGroupValues) && isset($oldGroupValues[$key])) {
-                    $value = $oldGroupValues[$key];
+                //merge original config or db config to default setting, exclude code part
+                if ($prefix != 'code') {
+                    if (isset($settingsFromDb[$prefix][$key])) {
+                        $this->doLog(sprintf(
+                            "$prefix.$key, db exists, change from: %s => %s",
+                            is_scalar($value) ? $value : json_encode($value),
+                            is_scalar($settingsFromDb[$prefix][$key]) ? $settingsFromDb[$prefix][$key] : json_encode($settingsFromDb[$prefix][$key]))
+                        );
+                        $value = $settingsFromDb[$prefix][$key];
+                    } elseif (isset($oldGroupValues) && isset($oldGroupValues[$key])) {
+                        $this->doLog(sprintf(
+                            "$prefix.$key, original config file exists, change from: %s => %s",
+                            is_scalar($value) ? $value : json_encode($value),
+                            is_scalar($oldGroupValues[$key]) ? $oldGroupValues[$key] : json_encode($oldGroupValues[$key]))
+                        );
+                        $value = $oldGroupValues[$key];
+                    }
                 }
                 if (isset($requireDirs[$prefix]) && in_array($key, $requireDirs[$prefix])) {
                     $dir = getFullDirectory($value);
@@ -458,7 +477,7 @@ class Install
     {
         foreach ($symbolicLinks as $path) {
             $linkName = ROOT_PATH . 'public/' . basename($path);
-            if (is_dir($linkName)) {
+            if (is_link($linkName)) {
                 $this->doLog("path: $linkName already exits, skip create symbolic link $linkName -> $path");
                 continue;
             }
diff --git a/nexus/Install/settings.default.php b/nexus/Install/settings.default.php
index 416a16d0..0deff5cd 100644
--- a/nexus/Install/settings.default.php
+++ b/nexus/Install/settings.default.php
@@ -107,7 +107,7 @@
     'guest_visit_type' => 'redirect',
     'guest_visit_value_static_page' => 'beian-aliyun.html',
     'guest_visit_value_custom_content' => ' [em24] ',
-    'guest_visit_value_redirect' => 'http://nexusphp.org/',
+    'guest_visit_value_redirect' => 'https://nexusphp.org/',
     'login_type' => 'secret',
     'login_secret_lifetime' => '10',
     'login_secret_deadline' => '2021-02-03 18:55:46',
@@ -353,8 +353,8 @@
   'code' => 
   array (
     'mainversion' => 'NexusPHP',
-    'subversion' => 'v1.6.0-beta1',
-    'releasedate' => '2021-01-30',
-    'website' => '<a href="http://nexusphp.org" target="_blank">http://nexusphp.org</a>',
+    'subversion' => 'v1.6.0-beta2',
+    'releasedate' => '2021-02-03',
+    'website' => '<a href="https://nexusphp.org" target="_blank">https://nexusphp.org</a>',
   ),
 );
\ No newline at end of file
diff --git a/nexus/Install/update/update.php b/nexus/Install/update/update.php
index c7344065..f2c9c118 100644
--- a/nexus/Install/update/update.php
+++ b/nexus/Install/update/update.php
@@ -183,7 +183,7 @@ if ($currentStep == 4) {
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link href="https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css" rel="stylesheet">
-    <title>Install NexusPHP | step <?php echo $currentStep?></title>
+    <title>Update NexusPHP | step <?php echo $currentStep?></title>
 </head>
 <body>
 <div class="container mx-auto">