diff --git a/PasteEx/Data.cs b/PasteEx/Data.cs
index 0b8c464..9a5eebe 100644
--- a/PasteEx/Data.cs
+++ b/PasteEx/Data.cs
@@ -89,6 +89,21 @@ public string[] Analyze()
                     extensions.Add(defaultExt);
                 }
             }
+            if (IData.GetDataPresent(DataFormats.FileDrop, false))
+            {
+                if (IData.GetData(DataFormats.FileDrop) is string[] filePaths)
+                {
+                    if (filePaths.Length == 1)
+                    {
+                        if (!String.IsNullOrEmpty(filePaths[0]))
+                        {
+                            DataStorage.SetData(DataFormats.FileDrop, IData.GetData(DataFormats.FileDrop));
+                            extensions.Clear();
+                            extensions.Add(Path.GetExtension(filePaths[0]).Remove(0, 1));
+                        }
+                    }
+                }
+            }
 
             extensions.Reverse();
             return extensions.ToArray();
@@ -112,7 +127,7 @@ public string GetImageExtension(IDataObject data)
                 {
                     string ext = url.Substring(i + 1);
 
-                    // a case of "*.png?SomeParameters"
+                    // a case of "*.png?SomeParameters" 
                     if (ext.Length > 3) { ext = ext.Substring(0, 3); }
 
                     if (imageExt.Contains(ext)) { return ext; } else { return null; }
@@ -199,6 +214,18 @@ public void SaveAs(string location, string fileName, string extension)
 
             try
             {
+                // copy file priority
+                if (DataStorage.GetDataPresent(DataFormats.FileDrop, false))
+                {
+                    string[] filePaths = DataStorage.GetData(DataFormats.FileDrop) as string[];
+                    if (filePaths.Length > 0 && !String.IsNullOrEmpty(filePaths[0]))
+                    {
+                        File.Copy(filePaths[0], path);
+                    }
+                    return;
+                }
+
+                // html/text/image
                 if (extension == "htmlformat")
                 {
                     File.WriteAllText(path, DataStorage.GetData(DataFormats.Html) as string, Encoding.UTF8);
diff --git a/PasteEx/FormMain.cs b/PasteEx/FormMain.cs
index 16b54a3..1cef29d 100644
--- a/PasteEx/FormMain.cs
+++ b/PasteEx/FormMain.cs
@@ -47,13 +47,6 @@ public FormMain(string location)
 
         private void FormMain_Load(object sender, EventArgs e)
         {
-            if(Properties.Settings.Default.callUpgrade)
-            {
-                Properties.Settings.Default.Upgrade();
-                Properties.Settings.Default.callUpgrade = false;
-                Properties.Settings.Default.Save();
-            }
-
             data = new Data(Clipboard.GetDataObject());
             string[] extensions = data.Analyze();
             cboExtension.Items.AddRange(extensions);
diff --git a/PasteEx/Resources/Resource-zh-CN.Designer.cs b/PasteEx/Resources/Resource-zh-CN.Designer.cs
index 7366b0d..35313cc 100644
--- a/PasteEx/Resources/Resource-zh-CN.Designer.cs
+++ b/PasteEx/Resources/Resource-zh-CN.Designer.cs
@@ -97,7 +97,7 @@ internal static string LblFileNameText {
         }
         
         /// <summary>
-        ///   查找类似 剪贴板为空，仍旧进入软件主界面？ 的本地化字符串。
+        ///   查找类似 剪贴板内容为空或不被支持，仍旧进入软件主界面？ 的本地化字符串。
         /// </summary>
         internal static string TipAnalyzeFailed {
             get {
@@ -187,7 +187,7 @@ internal static string TipRunAsAdmin {
         }
         
         /// <summary>
-        ///   查找类似 保存失败，请选择正确的扩展名 的本地化字符串。
+        ///   查找类似 保存失败，可能是选择的扩展名不正确 的本地化字符串。
         /// </summary>
         internal static string TipSaveFailed {
             get {
diff --git a/PasteEx/Resources/Resource-zh-CN.resx b/PasteEx/Resources/Resource-zh-CN.resx
index e3b6f63..c48b131 100644
--- a/PasteEx/Resources/Resource-zh-CN.resx
+++ b/PasteEx/Resources/Resource-zh-CN.resx
@@ -130,7 +130,7 @@
     <value>文件名:</value>
   </data>
   <data name="TipAnalyzeFailed" xml:space="preserve">
-    <value>剪贴板为空，仍旧进入软件主界面？</value>
+    <value>剪贴板内容为空或不被支持，仍旧进入软件主界面？</value>
   </data>
   <data name="TipDuplicateFileName" xml:space="preserve">
     <value>存在相同的文件名，是否覆盖？</value>
@@ -151,7 +151,7 @@
     <value>添加右键菜单时，请以管理员的身份运行本软件！</value>
   </data>
   <data name="TipSaveFailed" xml:space="preserve">
-    <value>保存失败，请选择正确的扩展名</value>
+    <value>保存失败，可能是选择的扩展名不正确</value>
   </data>
   <data name="TipUnRegister" xml:space="preserve">
     <value>右键菜单移除成功！</value>