diff --git a/ReadMe.md b/ReadMe.md
index 331f807..1dc4296 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -17,6 +17,10 @@ C# WinRAR 简体中文-商业版 提取器
 
 #### 更新日志
 
+2023-06-30 发布v1.0.0.4
+1.  增加版本日期递减枚举检测功能，以应付6.22版本生成日期与下载日期不同步问题。
+	(直接检测文件是否能正常下载，缺点是启动会稍微慢一点)
+
 2022-08-21 发布v1.0.0.3
 1.  修复新版x32位程序信息无法获取问题。
 2.  修复中文授权信息出现问号问题。
diff --git a/WinRAR-Extractor/HttpWebHelper.cs b/WinRAR-Extractor/HttpWebHelper.cs
index 1fbc1ae..f346249 100644
--- a/WinRAR-Extractor/HttpWebHelper.cs
+++ b/WinRAR-Extractor/HttpWebHelper.cs
@@ -119,6 +119,86 @@ public static string GetHttpWebData(string url, int? timeout, string userAgent,
             }
         }
 
+        /// <summary>
+        /// 创建GET方式的HTTP请求
+        /// </summary>
+        /// <param name="url">请求的URL</param>
+        /// <param name="timeout">请求的超时时间</param>
+        /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
+        /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
+        /// <returns></returns>
+        public static bool GetHttpCheck(string url, int? timeout, string userAgent, bool lastModified = false)
+        {
+            lock (_lotGetLocker)
+            {
+                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
+                
+                try
+                {
+                    if (string.IsNullOrEmpty(url))
+                    {
+                        throw new ArgumentNullException("url");
+                    }
+
+                    //如果是发送HTTPS请求
+                    if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
+                    {
+                        // 请求前设置一下使用的安全协议类型
+                        ServicePointManager.DefaultConnectionLimit = 512;
+                        ServicePointManager.Expect100Continue = true;
+                        ServicePointManager.CheckCertificateRevocationList = false;
+                        ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
+                        ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
+                    }
+
+                    request.Method = "GET";
+                    request.UserAgent = DefaultUserAgent;
+                    request.Accept = "text/html";
+                    request.Headers.Add("Accept-Language", "zh-CN,zh;q=0.9");
+                    request.AllowAutoRedirect = true;
+                    request.KeepAlive = false;
+                    if (!string.IsNullOrEmpty(userAgent))
+                    {
+                        request.UserAgent = userAgent;
+                    }
+                    if (timeout.HasValue)
+                    {
+                        request.Timeout = timeout.Value;
+                    }
+                    request.CookieContainer = new CookieContainer();
+
+                    //获取网页响应结果
+                    //while (response == null || response.StatusCode != HttpStatusCode.OK)
+                    //{
+                    //	if (Config.IsAppExit) return string.Empty;
+
+                    //	response = request.GetResponse() as HttpWebResponse;
+                    //}
+                    using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
+                    {
+                        // 获取HttpWebResponse数据
+                        if (response != null && response.StatusCode == HttpStatusCode.OK)
+                        {
+                            response.Close();
+                            response.Dispose();
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex.Message);
+                    //Config.logProc.WriteLine(ex.Message);
+                    if (request != null) request.Abort();
+                    return false;
+                }
+                finally
+                {
+                    if (request != null) request.Abort();
+                }
+                return true;
+            }
+        }
+
         //该方法用于验证服务器证书是否合法，当然可以直接返回true来表示验证永远通过。服务器证书具体内容在参数certificate中。可根据个人需求验证
         //该方法在request.GetResponse()时触发
         private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
diff --git a/WinRAR-Extractor/Properties/AssemblyInfo.cs b/WinRAR-Extractor/Properties/AssemblyInfo.cs
index 123f165..3acaaba 100644
--- a/WinRAR-Extractor/Properties/AssemblyInfo.cs
+++ b/WinRAR-Extractor/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@
 //可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
 // 方法是按如下所示使用“*”: :
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.3")]
-[assembly: AssemblyFileVersion("1.0.0.3")]
+[assembly: AssemblyVersion("1.0.0.4")]
+[assembly: AssemblyFileVersion("1.0.0.4")]
diff --git a/WinRAR-Extractor/frmExtractor.cs b/WinRAR-Extractor/frmExtractor.cs
index 16308da..252eec8 100644
--- a/WinRAR-Extractor/frmExtractor.cs
+++ b/WinRAR-Extractor/frmExtractor.cs
@@ -91,6 +91,30 @@ private void btnRefresh_Click(object sender, EventArgs e)
             string lastModified_x64 = HttpWebHelper.GetHttpWebData(freeUrl_x64, 3000, null, true);
             //Console.WriteLine(lastModified_x64);
 
+            int lmCheck = Convert.ToInt32(lastModified_x86);
+            while (lmCheck > 0)
+            {
+                if (!HttpWebHelper.GetHttpCheck($"https://www.win-rar.com/fileadmin/winrar-versions/sc/sc{lastModified_x86}/rrlb/{lastSCname_x86.Value}sc.exe", 3000, null, true))
+                {
+                    lmCheck--;
+                    lastModified_x86 = lmCheck.ToString();
+                    continue;
+                }
+                break;
+            }
+
+            lmCheck = Convert.ToInt32(lastModified_x64);
+            while (lmCheck > 0)
+            {
+                if (!HttpWebHelper.GetHttpCheck($"https://www.win-rar.com/fileadmin/winrar-versions/sc/sc{lastModified_x64}/rrlb/{lastSCname_x64.Value}sc.exe", 3000, null, true))
+                {
+                    lmCheck--;
+                    lastModified_x64 = lmCheck.ToString();
+                    continue;
+                }
+                break;
+            }
+
             this.labVersion.Text = $"最新版本：[{version}]，更新时间：[{lastModified_x86}]-[x86] / [{lastModified_x64}]-[x64] - [简体中文]";
 
             string rrlb_x86 = $"https://www.win-rar.com/fileadmin/winrar-versions/sc/sc{lastModified_x86}/rrlb/{lastSCname_x86.Value}sc.exe";
diff --git a/WinRAR-Generate/WinRAR-Generate.rc b/WinRAR-Generate/WinRAR-Generate.rc
index 901ca7b..524bc1f 100644
Binary files a/WinRAR-Generate/WinRAR-Generate.rc and b/WinRAR-Generate/WinRAR-Generate.rc differ
diff --git a/WinRAR-Generate/WinRAR-Generate.vcxproj b/WinRAR-Generate/WinRAR-Generate.vcxproj
index 805a36f..14a98e8 100644
--- a/WinRAR-Generate/WinRAR-Generate.vcxproj
+++ b/WinRAR-Generate/WinRAR-Generate.vcxproj
@@ -22,7 +22,7 @@
     <ProjectGuid>{E510275F-C4D1-4E4A-922C-9856CF1C8908}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>WinRARGenerate</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.10586.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">