diff --git a/windows/Classes/CheckIPWorking.cs b/windows/Classes/CheckIPWorking.cs
index 362af542..d7860b92 100644
--- a/windows/Classes/CheckIPWorking.cs
+++ b/windows/Classes/CheckIPWorking.cs
@@ -3,6 +3,7 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Net;
+using System.Net.NetworkInformation;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
@@ -27,6 +28,8 @@ internal class CheckIPWorking
         private bool isDiagnosing = false;
         public bool isV2rayExecutionSuccess = false;
 
+
+
         public CheckIPWorking(string ip, ScanSpeed targetSpeed, CustomConfigInfo scanConfig, int downloadTimeout, bool isDiagnosing = false)
         {
             this.ip = ip;
@@ -236,7 +239,7 @@ private bool createV2rayConfigFile()
                         .Replace("PORTPORT", port)
                         .Replace("HOSTHOST", clientConfig.host)
                         .Replace("CFPORTCFPORT", clientConfig.port)
-                        .Replace("RANDOMHOST", clientConfig.serverName)
+                        .Replace("RANDOMHOST", getRandomSNI(clientConfig.host))
                         .Replace("IP.IP.IP.IP", this.ip)
                         .Replace("ENDPOINTENDPOINT", clientConfig.path);
                 }
@@ -260,6 +263,13 @@ private bool createV2rayConfigFile()
 
         }
 
+        private string getRandomSNI(string host)
+        {
+            var urlParts = host.Split(".");
+            urlParts[0] = Guid.NewGuid().ToString();
+            return string.Join(".", urlParts); 
+        }
+
         // sum of ip segments plus 3000
         private string getPortByIP()
         {            
@@ -284,6 +294,7 @@ private bool runV2rayProcess()
             //}
             startInfo.UseShellExecute = false;
             startInfo.Arguments = $"run -config=\"{v2rayConfigPath}\"";
+            //startInfo.Arguments = $"-c \"{v2rayConfigPath}\"";
             Tools.logStep(Environment.NewLine + "----- Running v2ray.exe -----", isDiagnosing);
             Tools.logStep($"Starting v2ray.exe with arg: {startInfo.Arguments}", isDiagnosing);
             bool wasSuccess = false;
diff --git a/windows/Classes/IP/IPAddressExtensions.cs b/windows/Classes/IP/IPAddressExtensions.cs
index 14758bf0..2d44d908 100644
--- a/windows/Classes/IP/IPAddressExtensions.cs
+++ b/windows/Classes/IP/IPAddressExtensions.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
+using System.Net.NetworkInformation;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -56,8 +57,46 @@ public static List<string> getAllIPInRange(string ipAndNet)
             return getIPRange(splitted[0], Int32.Parse(splitted[1]));
         }
 
+        /// <summary>
+        /// checks for used ports and retrieves the first free port
+        /// </summary>
+        /// <returns>the free port or 0 if it did not find a free port</returns>
+        public static int getAvailablePort(int startingPort)
+        {
+            IPEndPoint[] endPoints;
+            List<int> portArray = new List<int>();
+
+            IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
+
+            //getting active connections
+            TcpConnectionInformation[] connections = properties.GetActiveTcpConnections();
+            portArray.AddRange(from n in connections
+                               where n.LocalEndPoint.Port >= startingPort
+                               select n.LocalEndPoint.Port);
+
+            //getting active tcp listners - WCF service listening in tcp
+            endPoints = properties.GetActiveTcpListeners();
+            portArray.AddRange(from n in endPoints
+                               where n.Port >= startingPort
+                               select n.Port);
+
+            //getting active udp listeners
+            endPoints = properties.GetActiveUdpListeners();
+            portArray.AddRange(from n in endPoints
+                               where n.Port >= startingPort
+                               select n.Port);
+
+            portArray.Sort();
+
+            for (int i = startingPort; i < UInt16.MaxValue; i++)
+                if (!portArray.Contains(i))
+                    return i;
+
+            return 0;
+        }
+
 
-        public static IPAddress GetBroadcastAddress(this IPAddress address, IPAddress subnetMask)
+    public static IPAddress GetBroadcastAddress(this IPAddress address, IPAddress subnetMask)
         {
             byte[] ipAdressBytes = address.GetAddressBytes();
             byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
diff --git a/windows/Properties/latest-version b/windows/Properties/latest-version
index 1f937720..6cb8a745 100644
--- a/windows/Properties/latest-version
+++ b/windows/Properties/latest-version
@@ -1 +1 @@
-v:1.1.8489.35707
\ No newline at end of file
+v:1.1.8506.21097
\ No newline at end of file
diff --git a/windows/assets/app-config.json b/windows/assets/app-config.json
index 77712506..eab93311 100644
--- a/windows/assets/app-config.json
+++ b/windows/assets/app-config.json
@@ -1,5 +1,5 @@
 {
 	"frontDomain": "speed.cloudflare.com/__down?bytes=1000",
 	"scanDomain": "speed.cloudflare.com/__down?bytes=",
-	"clientConfigUrl": "https://raw.githubusercontent.com/MortezaBashsiz/CFScanner/main/bash/ClientConfig.json"
+	"clientConfigUrl": "https://raw.githubusercontent.com/MortezaBashsiz/CFScanner/main/config/ClientConfig.json"
 }
\ No newline at end of file
diff --git a/windows/frmMain.cs b/windows/frmMain.cs
index 5c072515..f5cca7df 100644
--- a/windows/frmMain.cs
+++ b/windows/frmMain.cs
@@ -65,6 +65,8 @@ public frmMain()
                 isAppCongigValid = false;
             }
 
+
+
             scanEngine = new ScanEngine();
 
             loadLastResultsComboList();
@@ -287,6 +289,11 @@ private void startStopScan(ScanType scanType = ScanType.SCAN_CLOUDFLARE_IPS)
                 {
                     scanFinished = true;
 
+                    if (!scanEngine.progressInfo.pauseRequested)
+                    {
+                        lastScanType = null;
+                    }
+
                     // don't update results in diagnose test
                     if (!isDiagnosing)
                         currentScanResults = scanEngine.progressInfo.scanResults.workingIPs;