diff --git a/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs b/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
index a7b950d8..8c3a81f3 100644
--- a/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
@@ -354,6 +354,7 @@ namespace v2rayN.Handler
 
                     //Mux
                     outbound.mux.enabled = config.muxEnabled;
+                    outbound.mux.concurrency = config.muxEnabled ? 8 : -1;
 
                     //远程服务器底层传输配置
                     StreamSettings streamSettings = outbound.streamSettings;
@@ -384,6 +385,8 @@ namespace v2rayN.Handler
                     serversItem.level = 1;
 
                     outbound.mux.enabled = false;
+                    outbound.mux.concurrency = -1;
+                    
 
                     outbound.protocol = "shadowsocks";
                     outbound.settings.vnext = null;
@@ -418,6 +421,7 @@ namespace v2rayN.Handler
                     }
 
                     outbound.mux.enabled = false;
+                    outbound.mux.concurrency = -1;
 
                     outbound.protocol = "socks";
                     outbound.settings.vnext = null;
diff --git a/v2rayN/v2rayN/LIB/libs.zip b/v2rayN/v2rayN/LIB/libs.zip
index 3b787743..ce28e787 100644
Binary files a/v2rayN/v2rayN/LIB/libs.zip and b/v2rayN/v2rayN/LIB/libs.zip differ
diff --git a/v2rayN/v2rayN/Mode/V2rayConfig.cs b/v2rayN/v2rayN/Mode/V2rayConfig.cs
index 0d661c0f..5d4ab5df 100644
--- a/v2rayN/v2rayN/Mode/V2rayConfig.cs
+++ b/v2rayN/v2rayN/Mode/V2rayConfig.cs
@@ -281,6 +281,11 @@ namespace v2rayN.Mode
         /// 
         /// </summary>
         public bool enabled { get; set; }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        public int concurrency { get; set; }
     }
 
     public class Response
diff --git a/v2rayN/v2rayN/Program.cs b/v2rayN/v2rayN/Program.cs
index 36ffb2e8..61797937 100644
--- a/v2rayN/v2rayN/Program.cs
+++ b/v2rayN/v2rayN/Program.cs
@@ -28,20 +28,20 @@ namespace v2rayN
             Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
             AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
 
-         
+
             //AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
 
             Process instance = RunningInstance();
             if (instance == null)
-            {                
+            {
                 if (!UnzipLibs())
                 {
                     UI.Show($"Error preparing the environment(准备运行环境出错)");
                     return;
                 }
 
-                Utils.SaveLog("v2rayN start up");
-                
+                Utils.SaveLog("v2rayN start up " + Utils.GetVersion());
+
                 //设置语言环境
                 string lang = Utils.RegReadValue(Global.MyRegPath, Global.MyRegKeyLanguage, "zh-Hans");
                 System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(lang);
diff --git a/v2rayN/v2rayN/Properties/AssemblyInfo.cs b/v2rayN/v2rayN/Properties/AssemblyInfo.cs
index abd9350d..d7a18cd3 100644
--- a/v2rayN/v2rayN/Properties/AssemblyInfo.cs
+++ b/v2rayN/v2rayN/Properties/AssemblyInfo.cs
@@ -33,4 +33,4 @@ using System.Runtime.InteropServices;
 // 方法是按如下所示使用“*”:
 //[assembly: AssemblyVersion("1.0.*")]
 //[assembly: AssemblyVersion("1.0.0")]
-[assembly: AssemblyFileVersion("3.4")]
+[assembly: AssemblyFileVersion("3.5")]
diff --git a/v2rayN/v2rayUpgrade/MainForm.cs b/v2rayN/v2rayUpgrade/MainForm.cs
index 281f5d4b..64982a12 100644
--- a/v2rayN/v2rayUpgrade/MainForm.cs
+++ b/v2rayN/v2rayUpgrade/MainForm.cs
@@ -1,14 +1,7 @@
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
 using System.Diagnostics;
-using System.Drawing;
 using System.IO;
 using System.IO.Compression;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace v2rayUpgrade
@@ -16,6 +9,7 @@ namespace v2rayUpgrade
     public partial class MainForm : Form
     {
         private string[] _args;
+        private string _tempFileName = "v2rayUpgradeTemp.zip";
 
 
         public MainForm(string[] args)
@@ -35,9 +29,37 @@ namespace v2rayUpgrade
             {
                 return;
             }
+
             try
             {
-                var fileName = _args[0];
+                Process[] existing = Process.GetProcessesByName("v2rayN");
+                foreach (Process p in existing)
+                {
+                    var path = p.MainModule.FileName;
+                    if (path == GetPath("v2rayN.exe"))
+                    {
+                        p.Kill();
+                        p.WaitForExit(100);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Failed to close v2rayN(关闭v2rayN失败)." + ex.StackTrace);
+                return;
+            }
+
+            var fileName = GetPath(_tempFileName);
+            try
+            {
+                File.Delete(fileName);
+                File.Copy(_args[0], fileName);
+                if (!File.Exists(fileName))
+                {
+                    MessageBox.Show("Upgrade Failed, File Not Exist(升级失败,文件不存在).");
+                    return;
+                }
+
                 var startKey = "v2rayN/";
 
                 using (ZipArchive archive = ZipFile.OpenRead(fileName))
@@ -67,6 +89,10 @@ namespace v2rayUpgrade
                 MessageBox.Show("Upgrade Failed(升级失败)." + ex.StackTrace);
                 return;
             }
+            finally
+            {
+                File.Delete(fileName);
+            }
 
             MessageBox.Show("Upgrade  successed(升级成功)");
 
diff --git a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
index f7879414..a36e3f55 100644
--- a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
+++ b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
@@ -23,6 +23,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>