diff --git a/mainwindow.cpp b/mainwindow.cpp
index 346da4e..5c4a87c 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -8,6 +8,9 @@
 #include <QDesktopServices>
 
 #include "mainwindow.h"
+
+#include <set>
+
 #include "ui_mainwindow.h"
 #include "zjuconnectcontroller/zjuconnectcontroller.h"
 #include "utils/utils.h"
@@ -219,7 +222,7 @@ MainWindow::MainWindow(QWidget *parent) :
             }
         });
 
-    if (settings->value("Common/checkUpdateAfterStart", true).toBool())
+    if (settings->value("Common/CheckUpdateAfterStart", true).toBool())
     {
         checkUpdate();
     }
@@ -262,8 +265,25 @@ void MainWindow::checkUpdate()
 
 void MainWindow::upgradeSettings()
 {
-    int configVersion = settings->value("Common/ConfigVersion", 1).toInt();
-    // 备用
+    int configVersion = settings->value("Common/ConfigVersion", Utils::CONFIG_VERSION).toInt();
+
+    if (configVersion < Utils::CONFIG_VERSION)
+    {
+        QMessageBox msgBox;
+        msgBox.setText("存在配置更新");
+        msgBox.setInformativeText("建议恢复默认设置，以使用优化的配置。\n\n是否恢复默认设置？");
+        msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
+        msgBox.setDefaultButton(QMessageBox::Cancel);
+
+        if (msgBox.exec() == QMessageBox::Ok)
+        {
+            settings->clear();
+            QMessageBox::information(this, "完成", "已恢复默认设置。");
+        }
+    }
+
+    settings->setValue("Common/ConfigVersion", Utils::CONFIG_VERSION);
+    settings->sync();
 }
 
 void MainWindow::showNotification(const QString &title, const QString &content, QSystemTrayIcon::MessageIcon icon)
@@ -288,11 +308,11 @@ void MainWindow::showNotification(const QString &title, const QString &content,
 void MainWindow::cleanUpWhenQuit()
 {
     // 保存配置
-    if (settings->value("Common/ConfigVersion", "1").toInt() <= 2)
+    if (settings->value("Common/ConfigVersion", 0).toInt() <= Utils::CONFIG_VERSION)
     {
-        settings->setValue("Common/ConfigVersion", 2);
-        settings->sync();
+        settings->setValue("Common/ConfigVersion", Utils::CONFIG_VERSION);
     }
+    settings->sync();
 
     // 清除系统代理
     if (isSystemProxySet)
diff --git a/settingwindow/settingwindow.cpp b/settingwindow/settingwindow.cpp
index 1cb5bce..47ec315 100644
--- a/settingwindow/settingwindow.cpp
+++ b/settingwindow/settingwindow.cpp
@@ -45,7 +45,7 @@ SettingWindow::SettingWindow(QWidget *parent, QSettings *inputSettings) :
             settings->setValue("Common/Password", QString(ui->passwordLineEdit->text().toUtf8().toBase64()));
             settings->setValue("Common/AutoStart", ui->autoStartCheckBox->isChecked());
             settings->setValue("Common/ConnectAfterStart", ui->connectAfterStartCheckBox->isChecked());
-            settings->setValue("Common/checkUpdateAfterStart", ui->checkUpdateAfterStartCheckBox->isChecked());
+            settings->setValue("Common/CheckUpdateAfterStart", ui->checkUpdateAfterStartCheckBox->isChecked());
 
             settings->setValue("ZJUConnect/ServerAddress", ui->serverAddressLineEdit->text());
             settings->setValue("ZJUConnect/ServerPort", ui->serverPortSpinBox->value());
@@ -69,6 +69,8 @@ SettingWindow::SettingWindow(QWidget *parent, QSettings *inputSettings) :
             settings->setValue("ZJUConnect/DNSHijack", ui->dnsHijackCheckBox->isChecked());
             settings->setValue("ZJUConnect/OutsideAccess", ui->outsideAccessCheckBox->isChecked());
 
+            settings->setValue("Common/ConfigVersion", Utils::CONFIG_VERSION);
+
             settings->sync();
         };
 
@@ -125,26 +127,26 @@ void SettingWindow::loadSettings()
 
     ui->autoStartCheckBox->setChecked(settings->value("Common/AutoStart", false).toBool());
     ui->connectAfterStartCheckBox->setChecked(settings->value("Common/ConnectAfterStart", false).toBool());
-    ui->checkUpdateAfterStartCheckBox->setChecked(settings->value("Common/checkUpdateAfterStart", true).toBool());
+    ui->checkUpdateAfterStartCheckBox->setChecked(settings->value("Common/CheckUpdateAfterStart", true).toBool());
 
     ui->serverAddressLineEdit->setText(settings->value("ZJUConnect/ServerAddress", "vpn.hitsz.edu.cn").toString());
     ui->serverPortSpinBox->setValue(settings->value("ZJUConnect/ServerPort", 443).toInt());
     ui->dnsLineEdit->setText(settings->value("ZJUConnect/DNS", "10.248.98.30").toString());
     ui->socks5PortSpinBox->setValue(settings->value("ZJUConnect/Socks5Port", 11080).toInt());
     ui->httpPortSpinBox->setValue(settings->value("ZJUConnect/HttpPort", 11081).toInt());
-    ui->multiLineCheckBox->setChecked(settings->value("ZJUConnect/MultiLine", true).toBool());
+    ui->multiLineCheckBox->setChecked(settings->value("ZJUConnect/MultiLine", false).toBool());
     ui->proxyAllCheckBox->setChecked(settings->value("ZJUConnect/ProxyAll", false).toBool());
     ui->debugCheckBox->setChecked(settings->value("ZJUConnect/Debug", false).toBool());
     tcpPortForwarding = settings->value("ZJUConnect/TcpPortForwarding", "").toString();
     udpPortForwarding = settings->value("ZJUConnect/UdpPortForwarding", "").toString();
     ui->autoReconnectCheckBox->setChecked(settings->value("ZJUConnect/AutoReconnect", false).toBool());
     ui->reconnectTimeSpinBox->setValue(settings->value("ZJUConnect/ReconnectTime", 1).toInt());
-    ui->autoSetProxyCheckBox->setChecked(settings->value("ZJUConnect/AutoSetProxy", true).toBool());
+    ui->autoSetProxyCheckBox->setChecked(settings->value("ZJUConnect/AutoSetProxy", false).toBool());
     ui->routeCheckBox->setChecked(settings->value("ZJUConnect/Route", false).toBool());
     ui->secondaryDnsLineEdit->setText(settings->value("ZJUConnect/SecondaryDNS", "").toString());
     ui->shadowsocksUrlLineEdit->setText(settings->value("ZJUConnect/ShadowsocksUrl", "").toString());
     ui->systemProxyBypassLineEdit->setText(settings->value("ZJUConnect/SystemProxyBypass", "localhost").toString());
-    ui->keepAliveCheckBox->setChecked(settings->value("ZJUConnect/KeepAlive", true).toBool());
+    ui->keepAliveCheckBox->setChecked(settings->value("ZJUConnect/KeepAlive", false).toBool());
     ui->tunCheckBox->setChecked(settings->value("ZJUConnect/TunMode", false).toBool());
     ui->dnsHijackCheckBox->setChecked(settings->value("ZJUConnect/DNSHijack", false).toBool());
     ui->outsideAccessCheckBox->setChecked(settings->value("ZJUConnect/OutsideAccess", false).toBool());
diff --git a/utils/utils.h b/utils/utils.h
index 8017aa8..4eee2dc 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -11,6 +11,8 @@ namespace Utils
 
     const inline QString APP_NAME("HITsz Connect for Windows");
 
+    constexpr inline int CONFIG_VERSION = 3;
+
     QString ConsoleOutputToQString(const QByteArray &byteArray);
 
     void setWidgetFixedWhenHidden(QWidget *widget);
diff --git a/zjuconnectmode.cpp b/zjuconnectmode.cpp
index c64ef67..fcf5486 100644
--- a/zjuconnectmode.cpp
+++ b/zjuconnectmode.cpp
@@ -131,7 +131,7 @@ void MainWindow::initZjuConnect()
                         ui->pushButton1->setText("断开服务器");
                         ui->pushButton2->show();
 
-                        if (settings->value("ZJUConnect/AutoSetProxy", true).toBool())
+                        if (settings->value("ZJUConnect/AutoSetProxy", false).toBool())
                         {
                             ui->pushButton2->click();
                         }
@@ -144,8 +144,8 @@ void MainWindow::initZjuConnect()
                             settings->value("ZJUConnect/ServerPort", 443).toInt(),
                             settings->value("ZJUConnect/DNS").toString(),
                             settings->value("ZJUConnect/SecondaryDNS", "").toString(),
-                            !settings->value("ZJUConnect/MultiLine", true).toBool(),
-                            !settings->value("ZJUConnect/KeepAlive", true).toBool(),
+                            !settings->value("ZJUConnect/MultiLine", false).toBool(),
+                            !settings->value("ZJUConnect/KeepAlive", false).toBool(),
                             settings->value("ZJUConnect/ProxyAll", false).toBool(),
                             bind_prefix + QString::number(settings->value("ZJUConnect/Socks5Port", 11080).toInt()),
                             bind_prefix + QString::number(settings->value("ZJUConnect/HttpPort", 11081).toInt()),