diff --git a/Build.Counter b/Build.Counter
index 0f3c80e3..64b0edc1 100644
--- a/Build.Counter
+++ b/Build.Counter
@@ -1 +1 @@
-3005
+3011
diff --git a/src/Qv2rayBase.hpp b/src/Qv2rayBase.hpp
index 34d4ab0d..3628558d 100644
--- a/src/Qv2rayBase.hpp
+++ b/src/Qv2rayBase.hpp
@@ -9,7 +9,7 @@
 #include "QvTinyLog.hpp"
 #include "QvCoreConfigObjects.hpp"
 
-const int QV2RAY_CONFIG_VERSION = 6;
+const int QV2RAY_CONFIG_VERSION = 7;
 
 // Linux users and DEs should handle the darkMode UI themselves.
 #ifndef QV2RAY_USE_BUILTIN_DARKTHEME
@@ -189,11 +189,17 @@ namespace Qv2ray
             bool enableProxy;
             bool withLocalDNS;
             QList<QString> dnsList;
-            int statsPort;
             Qv2rayForwardProxyConfig forwardProxyConfig;
 
-            Qv2rayConnectionConfig() : bypassCN(true), enableProxy(true), withLocalDNS(false), dnsList(QStringList() << "8.8.4.4" << "1.1.1.1"), statsPort(15490) { }
-            XTOSTRUCT(O(bypassCN, enableProxy, withLocalDNS, dnsList, statsPort, forwardProxyConfig))
+            Qv2rayConnectionConfig() : bypassCN(true), enableProxy(true), withLocalDNS(false), dnsList(QStringList() << "8.8.4.4" << "1.1.1.1") { }
+            XTOSTRUCT(O(bypassCN, enableProxy, withLocalDNS, dnsList, forwardProxyConfig))
+        };
+
+        struct Qv2rayAPIConfig {
+            bool enableAPI;
+            int statsPort;
+            Qv2rayAPIConfig(): enableAPI(true), statsPort(15490) { }
+            XTOSTRUCT(O(enableAPI, statsPort))
         };
 
         struct Qv2rayConfig {
@@ -210,6 +216,7 @@ namespace Qv2ray
             QMap<QString, Qv2raySubscriptionConfig> subscriptions;
             //
             Qv2rayUIConfig uiConfig;
+            Qv2rayAPIConfig apiConfig;
             Qv2rayInboundsConfig inboundConfig;
             Qv2rayConnectionConfig connectionConfig;
             Qv2rayToolBarConfig toolBarConfig;
diff --git a/src/QvConfigUpgrade.cpp b/src/QvConfigUpgrade.cpp
index 592f25f5..6327f2ce 100644
--- a/src/QvConfigUpgrade.cpp
+++ b/src/QvConfigUpgrade.cpp
@@ -123,6 +123,16 @@ namespace Qv2ray
                 root["subscriptions"] = newSubscriptions;
                 break;
             }
+
+            // Qv2ray version 2, RC 4
+            case 6: {
+                // Moved API Stats port from connectionConfig to apiConfig
+                QJsonObject apiConfig;
+                apiConfig["enableAPI"] = true;
+                apiConfig["statsPort"] = root["connectionConfig"].toObject()["statsPort"].toInt();
+                root["apiConfig"] = apiConfig;
+                break;
+            }
         }
 
         root["config_version"] = root["config_version"].toInt() + 1;
diff --git a/src/QvCoreConfigOperations_Generation.cpp b/src/QvCoreConfigOperations_Generation.cpp
index 5fa187f2..46f9b25f 100644
--- a/src/QvCoreConfigOperations_Generation.cpp
+++ b/src/QvCoreConfigOperations_Generation.cpp
@@ -408,7 +408,7 @@ namespace Qv2ray
                     INBOUNDS inbounds = INBOUNDS(root["inbounds"].toArray());
                     INBOUNDSETTING fakeDocodemoDoor;
                     fakeDocodemoDoor["address"] = "127.0.0.1";
-                    QJsonObject apiInboundsRoot = GenerateInboundEntry("127.0.0.1", gConf.connectionConfig.statsPort, "dokodemo-door", fakeDocodemoDoor, API_TAG_INBOUND);
+                    QJsonObject apiInboundsRoot = GenerateInboundEntry("127.0.0.1", gConf.apiConfig.statsPort, "dokodemo-door", fakeDocodemoDoor, API_TAG_INBOUND);
                     inbounds.push_front(apiInboundsRoot);
                     root["inbounds"] = inbounds;
                     //
diff --git a/src/components/QvKernelInteractions.cpp b/src/components/QvKernelInteractions.cpp
index 0739bd07..c9da19a0 100644
--- a/src/components/QvKernelInteractions.cpp
+++ b/src/components/QvKernelInteractions.cpp
@@ -63,22 +63,18 @@ namespace Qv2ray
             // Check if V2ray core returns a version number correctly.
             QProcess proc;
             proc.start(vCorePath + " -version");
+            proc.waitForFinished();
+            auto exitCode = proc.exitCode();
 
-            if (!proc.waitForFinished(1000) || proc.exitCode() != 0) {
-                DEBUG(MODULE_VCORE, "V2ray core not exited within 1 sec, or it failed with an exit code: " + QSTRN(proc.exitCode()))
-
-                if (proc.exitCode() != 0) {
-                    *message = tr("V2ray core failed with an exit code: ") + QSTRN(proc.exitCode());
-                } else {
-                    *message = tr("V2ray core not responsed within 1 secs.");
-                }
-
+            if (exitCode != 0) {
+                DEBUG(MODULE_VCORE, "VCore failed with an exit code: " + QSTRN(exitCode))
+                *message = tr("V2ray core failed with an exit code: ") + QSTRN(exitCode);
                 return false;
             }
 
             QString output = QString(proc.readAllStandardOutput());
             LOG(MODULE_VCORE, "V2ray output: " + SplitLines(output).join(";"))
-            *message =  SplitLines(output).first();
+            *message = SplitLines(output).first();
             return true;
         }
 
@@ -134,7 +130,7 @@ namespace Qv2ray
             KernelStarted = false;
         }
 
-        bool V2rayKernelInstance::StartConnection(CONFIGROOT root, int apiPort)
+        bool V2rayKernelInstance::StartConnection(CONFIGROOT root)
         {
             if (KernelStarted) {
                 LOG(MODULE_VCORE, "Status is invalid, expect STOPPED when calling StartConnection")
@@ -169,15 +165,18 @@ namespace Qv2ray
                 vProcess->waitForStarted();
                 DEBUG(MODULE_VCORE, "V2ray core started.")
                 KernelStarted = true;
+                auto conf = GetGlobalConfig();
 
                 if (StartupOption.noAPI) {
                     LOG(MODULE_VCORE, "API has been disabled by the command line argument \"-noAPI\"")
+                } else if (!conf.apiConfig.enableAPI) {
+                    LOG(MODULE_VCORE, "API has been disabled by the global config option")
                 } else if (inboundTags.isEmpty()) {
                     LOG(MODULE_VCORE, "API is disabled since no inbound tags configured. This is probably caused by a bad complex config.")
                 } else {
                     // Config API
                     apiFailedCounter = 0;
-                    this->apiPort = apiPort;
+                    this->apiPort = conf.apiConfig.statsPort;
                     Channel = grpc::CreateChannel("127.0.0.1:" + to_string(apiPort), grpc::InsecureChannelCredentials());
                     StatsService service;
                     Stub = service.NewStub(Channel);
diff --git a/src/components/QvKernelInteractions.hpp b/src/components/QvKernelInteractions.hpp
index f5a47555..51e3d217 100644
--- a/src/components/QvKernelInteractions.hpp
+++ b/src/components/QvKernelInteractions.hpp
@@ -27,7 +27,7 @@ namespace Qv2ray
                 long getAllSpeedUp();
                 long getAllSpeedDown();
                 //
-                bool StartConnection(CONFIGROOT root, int apiPort);
+                bool StartConnection(CONFIGROOT root);
                 void StopConnection();
                 bool KernelStarted = false;
                 //
diff --git a/src/ui/w_MainWindow_extra.cpp b/src/ui/w_MainWindow_extra.cpp
index 4900287e..4809f60b 100644
--- a/src/ui/w_MainWindow_extra.cpp
+++ b/src/ui/w_MainWindow_extra.cpp
@@ -130,7 +130,7 @@ bool MainWindow::MWtryStartConnection()
 {
     auto connectionRoot = connections[CurrentConnectionIdentifier].config;
     currentFullConfig = GenerateRuntimeConfig(connectionRoot);
-    bool startFlag = this->vinstance->StartConnection(currentFullConfig, currentConfig.connectionConfig.statsPort);
+    bool startFlag = this->vinstance->StartConnection(currentFullConfig);
 
     if (startFlag) {
         bool usePAC = currentConfig.inboundConfig.pacConfig.enablePAC;
diff --git a/src/ui/w_PreferencesWindow.cpp b/src/ui/w_PreferencesWindow.cpp
index dd88149d..4ccea048 100644
--- a/src/ui/w_PreferencesWindow.cpp
+++ b/src/ui/w_PreferencesWindow.cpp
@@ -100,7 +100,7 @@ PreferencesWindow::PreferencesWindow(QWidget *parent) : QDialog(parent),
     //
     vCorePathTxt->setText(CurrentConfig.v2CorePath);
     vCoreAssetsPathTxt->setText(CurrentConfig.v2AssetsPath);
-    statsPortBox->setValue(CurrentConfig.connectionConfig.statsPort);
+    statsPortBox->setValue(CurrentConfig.apiConfig.statsPort);
     //
     //
     bypassCNCb->setChecked(CurrentConfig.connectionConfig.bypassCN);
@@ -203,7 +203,7 @@ void PreferencesWindow::on_buttonBox_accepted()
 
     if (!StartupOption.noAPI) {
         size ++;
-        ports << CurrentConfig.connectionConfig.statsPort;
+        ports << CurrentConfig.apiConfig.statsPort;
     }
 
     if (ports.size() != size) {
@@ -466,7 +466,7 @@ void PreferencesWindow::on_bypassCNCb_stateChanged(int arg1)
 void PreferencesWindow::on_statsPortBox_valueChanged(int arg1)
 {
     NEEDRESTART
-    CurrentConfig.connectionConfig.statsPort = arg1;
+    CurrentConfig.apiConfig.statsPort = arg1;
 }
 
 void PreferencesWindow::on_socksPortLE_valueChanged(int arg1)
@@ -1021,3 +1021,10 @@ void PreferencesWindow::on_maxLogLinesSB_valueChanged(int arg1)
     NEEDRESTART
     CurrentConfig.uiConfig.maximumLogLines = arg1;
 }
+
+void PreferencesWindow::on_enableAPI_stateChanged(int arg1)
+{
+    LOADINGCHECK
+    NEEDRESTART
+    CurrentConfig.apiConfig.enableAPI = arg1 == Qt::Checked;
+}
diff --git a/src/ui/w_PreferencesWindow.hpp b/src/ui/w_PreferencesWindow.hpp
index 30cf02c8..3902628f 100644
--- a/src/ui/w_PreferencesWindow.hpp
+++ b/src/ui/w_PreferencesWindow.hpp
@@ -160,6 +160,8 @@ class PreferencesWindow : public QDialog, private Ui::PreferencesWindow
 
         void on_maxLogLinesSB_valueChanged(int arg1);
 
+        void on_enableAPI_stateChanged(int arg1);
+
     private:
         void SetAutoStartButtonsState(bool isAutoStart);
         // Set ui parameters for a line;
diff --git a/src/ui/w_PreferencesWindow.ui b/src/ui/w_PreferencesWindow.ui
index 53084af3..28005871 100644
--- a/src/ui/w_PreferencesWindow.ui
+++ b/src/ui/w_PreferencesWindow.ui
@@ -44,7 +44,7 @@
             <x>0</x>
             <y>0</y>
             <width>647</width>
-            <height>476</height>
+            <height>547</height>
            </rect>
           </property>
           <layout class="QFormLayout" name="formLayout_5">
@@ -248,13 +248,107 @@
             </layout>
            </item>
            <item row="2" column="0">
+            <layout class="QVBoxLayout" name="verticalLayout_3">
+             <item>
+              <spacer name="verticalSpacer_16">
+               <property name="orientation">
+                <enum>Qt::Vertical</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>20</width>
+                 <height>40</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
+             <item>
+              <widget class="QLabel" name="label_64">
+               <property name="text">
+                <string>API Subsystem</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <spacer name="verticalSpacer_15">
+               <property name="orientation">
+                <enum>Qt::Vertical</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>20</width>
+                 <height>40</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
+            </layout>
+           </item>
+           <item row="2" column="1">
+            <layout class="QGridLayout" name="gridLayout_4" columnstretch="0,0,1">
+             <item row="1" column="1">
+              <widget class="QLabel" name="label_8">
+               <property name="text">
+                <string>API Port</string>
+               </property>
+              </widget>
+             </item>
+             <item row="0" column="1">
+              <widget class="QLabel" name="label_68">
+               <property name="text">
+                <string>Enabled</string>
+               </property>
+              </widget>
+             </item>
+             <item row="1" column="2">
+              <widget class="QSpinBox" name="statsPortBox">
+               <property name="minimumSize">
+                <size>
+                 <width>100</width>
+                 <height>0</height>
+                </size>
+               </property>
+               <property name="minimum">
+                <number>1024</number>
+               </property>
+               <property name="maximum">
+                <number>65535</number>
+               </property>
+               <property name="value">
+                <number>15934</number>
+               </property>
+              </widget>
+             </item>
+             <item row="0" column="2">
+              <widget class="QCheckBox" name="enableAPI">
+               <property name="text">
+                <string>Enabled</string>
+               </property>
+              </widget>
+             </item>
+             <item row="0" column="0" rowspan="2">
+              <widget class="Line" name="line_4">
+               <property name="frameShadow">
+                <enum>QFrame::Plain</enum>
+               </property>
+               <property name="lineWidth">
+                <number>2</number>
+               </property>
+               <property name="orientation">
+                <enum>Qt::Vertical</enum>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+           <item row="3" column="0">
             <widget class="QLabel" name="label">
              <property name="text">
               <string>Log Level</string>
              </property>
             </widget>
            </item>
-           <item row="2" column="1">
+           <item row="3" column="1">
             <widget class="QComboBox" name="logLevelComboBox">
              <property name="sizePolicy">
               <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
@@ -295,7 +389,7 @@
              </item>
             </widget>
            </item>
-           <item row="3" column="0">
+           <item row="4" column="0">
             <layout class="QVBoxLayout" name="verticalLayout_9">
              <item>
               <spacer name="verticalSpacer_6">
@@ -332,7 +426,7 @@
              </item>
             </layout>
            </item>
-           <item row="3" column="1">
+           <item row="4" column="1">
             <layout class="QGridLayout" name="gridLayout_8" columnstretch="0,0,1">
              <item row="1" column="1">
               <widget class="QLabel" name="label_61">
@@ -381,21 +475,21 @@
              </item>
             </layout>
            </item>
-           <item row="4" column="0">
+           <item row="5" column="0">
             <widget class="QLabel" name="label_7">
              <property name="text">
               <string>Transparent Proxy</string>
              </property>
             </widget>
            </item>
-           <item row="4" column="1">
+           <item row="5" column="1">
             <widget class="QCheckBox" name="tProxyCheckBox">
              <property name="text">
               <string>Enabled</string>
              </property>
             </widget>
            </item>
-           <item row="5" column="0">
+           <item row="6" column="0">
             <layout class="QVBoxLayout" name="verticalLayout_8">
              <item>
               <spacer name="verticalSpacer_12">
@@ -432,7 +526,7 @@
              </item>
             </layout>
            </item>
-           <item row="5" column="1">
+           <item row="6" column="1">
             <layout class="QGridLayout" name="gridLayout_9">
              <item row="0" column="0" rowspan="3">
               <widget class="Line" name="line_3">
@@ -494,7 +588,7 @@
              </item>
             </layout>
            </item>
-           <item row="6" column="1">
+           <item row="7" column="1">
             <spacer name="verticalSpacer_11">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
@@ -995,53 +1089,27 @@
              </widget>
             </item>
             <item row="2" column="0">
-             <widget class="QLabel" name="label_8">
-              <property name="text">
-               <string>API Port</string>
-              </property>
-             </widget>
-            </item>
-            <item row="2" column="1">
-             <widget class="QSpinBox" name="statsPortBox">
-              <property name="minimumSize">
-               <size>
-                <width>100</width>
-                <height>0</height>
-               </size>
-              </property>
-              <property name="minimum">
-               <number>1024</number>
-              </property>
-              <property name="maximum">
-               <number>65535</number>
-              </property>
-              <property name="value">
-               <number>15934</number>
-              </property>
-             </widget>
-            </item>
-            <item row="3" column="0">
              <widget class="QLabel" name="label_18">
               <property name="text">
                <string>Use Local DNS</string>
               </property>
              </widget>
             </item>
-            <item row="3" column="1">
+            <item row="2" column="1">
              <widget class="QCheckBox" name="localDNSCb">
               <property name="text">
                <string>Enabled</string>
               </property>
              </widget>
             </item>
-            <item row="4" column="0">
+            <item row="3" column="0">
              <widget class="QLabel" name="label_21">
               <property name="text">
                <string>Custom DNS List</string>
               </property>
              </widget>
             </item>
-            <item row="4" column="1">
+            <item row="3" column="1">
              <widget class="QPlainTextEdit" name="DNSListTxt"/>
             </item>
            </layout>
@@ -1879,7 +1947,6 @@ p, li { white-space: pre-wrap; }
   <tabstop>pushButton</tabstop>
   <tabstop>proxyDefaultCb</tabstop>
   <tabstop>bypassCNCb</tabstop>
-  <tabstop>statsPortBox</tabstop>
   <tabstop>localDNSCb</tabstop>
   <tabstop>DNSListTxt</tabstop>
   <tabstop>fpGroupBox</tabstop>
diff --git a/tools/grpc_gen.bat b/tools/grpc_gen.bat
index 18be7be5..cfb042c1 100644
--- a/tools/grpc_gen.bat
+++ b/tools/grpc_gen.bat
@@ -1,21 +1,21 @@
 @echo off
 cd tools
 echo Extracting files.
-%~dp0\7z.exe -y e %~dp0gRPC-win32.tar.gz -o%~dp0 && %~dp0\7z.exe -y x %~dp0gRPC-win32.tar -o%~dp0\..\libs\gRPC-win32
+"%~dp0\7z.exe" -y e "%~dp0gRPC-win32.tar.gz" -o"%~dp0 && %~dp0\7z.exe" -y x "%~dp0gRPC-win32.tar" -o"%~dp0\..\libs\gRPC-win32"
 if errorlevel 1 goto errored
 
-del %~dp0gRPC-win32.tar
+del "%~dp0gRPC-win32.tar"
 
-mkdir %~dp0..\libs\gen
+mkdir "%~dp0..\libs\gen"
 
 echo.
 echo Generate grpc.pb.h using gRPC and protocol buffer
 echo. ---^> Generating gRPC file.
-%~dp0\..\libs\gRPC-win32\bin\protoc.exe v2ray_api_commands.proto --grpc_out=%~dp0..\libs\gen --plugin=protoc-gen-grpc="%~dp0..\libs\gRPC-win32\bin\grpc_cpp_plugin.exe" 
+"%~dp0\..\libs\gRPC-win32\bin\protoc.exe" v2ray_api_commands.proto --grpc_out="%~dp0..\libs\gen" --plugin=protoc-gen-grpc="%~dp0..\libs\gRPC-win32\bin\grpc_cpp_plugin.exe" 
 if errorlevel 1 goto errored
 
 echo. ---^> Generating proto file.
-%~dp0\..\libs\gRPC-win32\bin\protoc.exe v2ray_api_commands.proto --cpp_out=%~dp0..\libs\gen
+"%~dp0\..\libs\gRPC-win32\bin\protoc.exe" v2ray_api_commands.proto --cpp_out="%~dp0..\libs\gen"
 if errorlevel 1 goto errored
 
 echo DONE
@@ -24,4 +24,4 @@ exit 0
 :errored
 echo %errorlevel%
 echo SOME PROCESS FAILED!
-exit 1
\ No newline at end of file
+exit 1