diff --git a/SpineViewer/App.xaml.cs b/SpineViewer/App.xaml.cs
index c0a342f..bbd70a0 100644
--- a/SpineViewer/App.xaml.cs
+++ b/SpineViewer/App.xaml.cs
@@ -20,7 +20,8 @@ namespace SpineViewer
     {
         public const string ProgId = "SpineViewer.skel";
 
-        public static readonly string ExeFilePath = Environment.ProcessPath;
+        public static readonly string ProcessPath = Environment.ProcessPath;
+        public static readonly string ProcessDirectory = Path.GetDirectoryName(Environment.ProcessPath);
         public static readonly string ProcessName = Process.GetCurrentProcess().ProcessName;
         public static readonly string Version = Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
 
diff --git a/SpineViewer/Models/PreferenceModel.cs b/SpineViewer/Models/PreferenceModel.cs
index afe9d3f..da94a82 100644
--- a/SpineViewer/Models/PreferenceModel.cs
+++ b/SpineViewer/Models/PreferenceModel.cs
@@ -76,6 +76,9 @@ namespace SpineViewer.Models
         [ObservableProperty]
         private bool _renderSelectedOnly;
 
+        [ObservableProperty]
+        private bool _associateFileSuffix;
+
         [ObservableProperty]
         private AppLanguage _appLanguage;
 
diff --git a/SpineViewer/Resources/Images/skel.ico b/SpineViewer/Resources/Images/skel.ico
new file mode 100644
index 0000000..1bc0a1d
Binary files /dev/null and b/SpineViewer/Resources/Images/skel.ico differ
diff --git a/SpineViewer/Resources/Images/skel.png b/SpineViewer/Resources/Images/skel.png
new file mode 100644
index 0000000..c8b006a
Binary files /dev/null and b/SpineViewer/Resources/Images/skel.png differ
diff --git a/SpineViewer/appicon.ico b/SpineViewer/Resources/Images/spineviewer.ico
similarity index 57%
rename from SpineViewer/appicon.ico
rename to SpineViewer/Resources/Images/spineviewer.ico
index f269c18..a74705d 100644
Binary files a/SpineViewer/appicon.ico and b/SpineViewer/Resources/Images/spineviewer.ico differ
diff --git a/SpineViewer/Resources/Images/spineviewer.png b/SpineViewer/Resources/Images/spineviewer.png
new file mode 100644
index 0000000..c1baefc
Binary files /dev/null and b/SpineViewer/Resources/Images/spineviewer.png differ
diff --git a/SpineViewer/Resources/Strings/en.xaml b/SpineViewer/Resources/Strings/en.xaml
index 085b860..130bea1 100644
--- a/SpineViewer/Resources/Strings/en.xaml
+++ b/SpineViewer/Resources/Strings/en.xaml
@@ -233,6 +233,7 @@
     <s:String x:Key="Str_RendererPreference">Preview Options</s:String>
 
     <s:String x:Key="Str_AppPreference">Application Options</s:String>
+    <s:String x:Key="Str_AssociateFileSuffix">Associate File Extension</s:String>
     <s:String x:Key="Str_Language">Language</s:String>
 
 </ResourceDictionary>
diff --git a/SpineViewer/Resources/Strings/ja.xaml b/SpineViewer/Resources/Strings/ja.xaml
index c9b71bc..ff01c69 100644
--- a/SpineViewer/Resources/Strings/ja.xaml
+++ b/SpineViewer/Resources/Strings/ja.xaml
@@ -233,6 +233,7 @@
     <s:String x:Key="Str_RendererPreference">プレビュー画面オプション</s:String>
 
     <s:String x:Key="Str_AppPreference">アプリケーションプション</s:String>
+    <s:String x:Key="Str_AssociateFileSuffix">ファイル拡張子を関連付ける</s:String>
     <s:String x:Key="Str_Language">言語</s:String>
 
 </ResourceDictionary>
diff --git a/SpineViewer/Resources/Strings/zh.xaml b/SpineViewer/Resources/Strings/zh.xaml
index 7f04789..c254bd8 100644
--- a/SpineViewer/Resources/Strings/zh.xaml
+++ b/SpineViewer/Resources/Strings/zh.xaml
@@ -233,6 +233,7 @@
     <s:String x:Key="Str_RendererPreference">预览画面选项</s:String>
 
     <s:String x:Key="Str_AppPreference">应用程序选项</s:String>
+    <s:String x:Key="Str_AssociateFileSuffix">关联文件后缀</s:String>
     <s:String x:Key="Str_Language">语言</s:String>
 
 </ResourceDictionary>
\ No newline at end of file
diff --git a/SpineViewer/SpineViewer.csproj b/SpineViewer/SpineViewer.csproj
index 4e75716..d638485 100644
--- a/SpineViewer/SpineViewer.csproj
+++ b/SpineViewer/SpineViewer.csproj
@@ -14,12 +14,15 @@
 
     <PropertyGroup>
         <NoWarn>$(NoWarn);NETSDK1206</NoWarn>
-        <ApplicationIcon>appicon.ico</ApplicationIcon>
+        <ApplicationIcon>Resources\Images\spineviewer.ico</ApplicationIcon>
         <ApplicationManifest>app.manifest</ApplicationManifest>
     </PropertyGroup>
-    
+
     <ItemGroup>
-      <Content Include="appicon.ico" />
+      <Content Include="Resources\Images\skel.ico">
+        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      </Content>
+      <Content Include="Resources\Images\spineviewer.ico" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/SpineViewer/ViewModels/MainWindow/PreferenceViewModel.cs b/SpineViewer/ViewModels/MainWindow/PreferenceViewModel.cs
index 19ce571..950c304 100644
--- a/SpineViewer/ViewModels/MainWindow/PreferenceViewModel.cs
+++ b/SpineViewer/ViewModels/MainWindow/PreferenceViewModel.cs
@@ -1,13 +1,16 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using Microsoft.Win32;
 using NLog;
 using Spine.SpineWrappers;
 using SpineViewer.Models;
+using SpineViewer.Natives;
 using SpineViewer.Services;
 using SpineViewer.Utils;
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Text;
@@ -23,6 +26,10 @@ namespace SpineViewer.ViewModels.MainWindow
         /// </summary>
         public static readonly string PreferenceFilePath = Path.Combine(Path.GetDirectoryName(Environment.ProcessPath), "preference.json");
 
+        private static readonly string SkelFileDescription = "SpineViewer File";
+        private static readonly string SkelIconFilePath = Path.Combine(App.ProcessDirectory, "Resources\\Images\\skel.ico");
+        private static readonly string ShellOpenCommand = $"\"{App.ProcessPath}\" \"%1\"";
+
         private static readonly Logger _logger = LogManager.GetCurrentClassLogger();
 
         private readonly MainWindowViewModel _vmMain;
@@ -63,8 +70,19 @@ namespace SpineViewer.ViewModels.MainWindow
         /// </summary>
         public void LoadPreference()
         {
-            if (JsonHelper.Deserialize<PreferenceModel>(PreferenceFilePath, out var obj, true)) 
-                Preference = obj;
+            if (JsonHelper.Deserialize<PreferenceModel>(PreferenceFilePath, out var obj, true))
+            {
+                try
+                {
+                    Preference = obj;
+                }
+                catch (Exception ex)
+                {
+
+                    _logger.Trace(ex.ToString());
+                    _logger.Error("Failed to load some prefereneces, {0}", ex.Message);
+                }
+            }
         }
 
         /// <summary>
@@ -94,6 +112,7 @@ namespace SpineViewer.ViewModels.MainWindow
                     DebugClippings = DebugClippings,
 
                     RenderSelectedOnly = RenderSelectedOnly,
+                    AssociateFileSuffix = AssociateFileSuffix,
                     AppLanguage = AppLanguage,
                 };
             }
@@ -118,6 +137,7 @@ namespace SpineViewer.ViewModels.MainWindow
                 DebugClippings = value.DebugClippings;
 
                 RenderSelectedOnly = value.RenderSelectedOnly;
+                AssociateFileSuffix = value.AssociateFileSuffix;
                 AppLanguage = value.AppLanguage;
             }
         }
@@ -230,6 +250,71 @@ namespace SpineViewer.ViewModels.MainWindow
             set => SetProperty(_vmMain.SFMLRendererViewModel.RenderSelectedOnly, value, v => _vmMain.SFMLRendererViewModel.RenderSelectedOnly = v);
         }
 
+        public bool AssociateFileSuffix
+        {
+            get
+            {
+                try
+                {
+                    // 检查 .skel 的 ProgID
+                    using (var key = Registry.CurrentUser.OpenSubKey(@"Software\Classes\.skel"))
+                    {
+                        var progIdValue = key?.GetValue("") as string;
+                        if (!string.Equals(progIdValue, App.ProgId, StringComparison.OrdinalIgnoreCase))
+                            return false;
+                    }
+
+                    // 检查 command 指令是否相同
+                    using (var key = Registry.CurrentUser.OpenSubKey($@"Software\Classes\{App.ProgId}\shell\open\command"))
+                    {
+                        var command = key?.GetValue("") as string;
+                        if (string.IsNullOrWhiteSpace(command))
+                            return false;
+                        return command == ShellOpenCommand;
+                    }
+                }
+                catch
+                {
+                    return false;
+                }
+            }
+            set
+            {
+                SetProperty(AssociateFileSuffix, value, v =>
+                {
+                    if (v)
+                    {
+                        // 文件关联
+                        using (var key = Registry.CurrentUser.CreateSubKey(@"Software\Classes\.skel"))
+                        {
+                            key?.SetValue("", App.ProgId);
+                        }
+
+                        using (var key = Registry.CurrentUser.CreateSubKey($@"Software\Classes\{App.ProgId}"))
+                        {
+                            key?.SetValue("", SkelFileDescription);
+                            using (var iconKey = key?.CreateSubKey("DefaultIcon"))
+                            {
+                                iconKey?.SetValue("", $"\"{SkelIconFilePath}\"");
+                            }
+                            using (var shellKey = key?.CreateSubKey(@"shell\open\command"))
+                            {
+                                shellKey?.SetValue("", ShellOpenCommand);
+                            }
+                        }
+                    }
+                    else
+                    {
+                        // 删除关联
+                        Registry.CurrentUser.DeleteSubKeyTree(@"Software\Classes\.skel", false);
+                        Registry.CurrentUser.DeleteSubKeyTree($@"Software\Classes\{App.ProgId}", false);
+                    }
+
+                    Shell32.SHChangeNotify(Shell32.SHCNE_ASSOCCHANGED, Shell32.SHCNF_IDLIST, IntPtr.Zero, IntPtr.Zero);
+                });
+            }
+        }
+
         public AppLanguage AppLanguage
         {
             get => ((App)App.Current).Language;
diff --git a/SpineViewer/Views/PreferenceDialog.xaml b/SpineViewer/Views/PreferenceDialog.xaml
index b3c7dfb..37723e4 100644
--- a/SpineViewer/Views/PreferenceDialog.xaml
+++ b/SpineViewer/Views/PreferenceDialog.xaml
@@ -143,13 +143,17 @@
                             <Grid.RowDefinitions>
                                 <RowDefinition Height="Auto"/>
                                 <RowDefinition Height="Auto"/>
+                                <RowDefinition Height="Auto"/>
                             </Grid.RowDefinitions>
 
                             <Label Grid.Row="0" Grid.Column="0" Content="{DynamicResource Str_RenderSelectedOnly}"/>
                             <ToggleButton Grid.Row="0" Grid.Column="1" IsChecked="{Binding RenderSelectedOnly}"/>
 
-                            <Label Grid.Row="1" Grid.Column="0" Content="{DynamicResource Str_Language}"/>
-                            <ComboBox Grid.Row="1" Grid.Column="1"
+                            <Label Grid.Row="1" Grid.Column="0" Content="{DynamicResource Str_AssociateFileSuffix}"/>
+                            <ToggleButton Grid.Row="1" Grid.Column="1" IsChecked="{Binding AssociateFileSuffix}"/>
+
+                            <Label Grid.Row="2" Grid.Column="0" Content="{DynamicResource Str_Language}"/>
+                            <ComboBox Grid.Row="2" Grid.Column="1"
                                       SelectedItem="{Binding AppLanguage}"
                                       ItemsSource="{x:Static vm:PreferenceViewModel.AppLanguageOptions}"/>