diff --git a/QuickLook.Plugin.IViewerPlugin/ContextObject.cs b/QuickLook.Plugin.IViewerPlugin/ContextObject.cs
index bad7a26..9bb2597 100644
--- a/QuickLook.Plugin.IViewerPlugin/ContextObject.cs
+++ b/QuickLook.Plugin.IViewerPlugin/ContextObject.cs
@@ -17,8 +17,6 @@
 
 using System;
 using System.ComponentModel;
-using System.Globalization;
-using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Windows;
 using QuickLook.Common.Annotations;
@@ -182,33 +180,6 @@ namespace QuickLook.Common
 
         public event PropertyChangedEventHandler PropertyChanged;
 
-        /// <summary>
-        ///     Get a string from translation Xml document.
-        /// </summary>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        public string GetString(string id, string file = null, CultureInfo locale = null, string failsafe = null)
-        {
-            return TranslationHelper.Get(id, file, locale, failsafe, Assembly.GetCallingAssembly());
-        }
-
-        /// <summary>
-        ///     Get a setting from Xml document.
-        /// </summary>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        public T GetSetting<T>(string id, T failsafe = default(T))
-        {
-            return SettingHelper.Get(id, failsafe, Assembly.GetCallingAssembly());
-        }
-
-        /// <summary>
-        ///     Set a setting from Xml document.
-        /// </summary>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        public void SetSetting(string id, object value)
-        {
-            SettingHelper.Set(id, value, Assembly.GetCallingAssembly());
-        }
-
         /// <summary>
         ///     Set the size of viewer window, scale or shrink to fit (to screen resolution).
         ///     The window can take maximum (maxRatio*resolution) space.
diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.xaml.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.xaml.cs
index a810593..d9db107 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.xaml.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.xaml.cs
@@ -22,6 +22,7 @@ using System.Windows.Input;
 using System.Windows.Media;
 using ICSharpCode.AvalonEdit.Highlighting;
 using QuickLook.Common;
+using QuickLook.Common.Helpers;
 using UtfUnknown;
 
 namespace QuickLook.Plugin.TextViewer
@@ -41,8 +42,7 @@ namespace QuickLook.Plugin.TextViewer
 
             viewer.PreviewMouseWheel += Viewer_MouseWheel;
 
-            viewer.FontFamily =
-                new FontFamily(context.GetString("Editor_FontFamily"));
+            viewer.FontFamily = new FontFamily(TranslationHelper.Get("Editor_FontFamily"));
 
             LoadFile(path);
         }
diff --git a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
index 3a58851..ee508fa 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
@@ -32,6 +32,7 @@ using Meta.Vlc.Interop.Media;
 using QuickLook.Common;
 using QuickLook.Common.Annotations;
 using QuickLook.Common.ExtensionMethods;
+using QuickLook.Common.Helpers;
 using MediaState = Meta.Vlc.Interop.Media.MediaState;
 
 namespace QuickLook.Plugin.VideoViewer
@@ -169,7 +170,7 @@ namespace QuickLook.Plugin.VideoViewer
 
         public void Dispose()
         {
-            _context.SetSetting("Volume", mediaElement.Volume);
+            SettingHelper.Set("Volume", mediaElement.Volume);
 
             try
             {
@@ -320,7 +321,7 @@ namespace QuickLook.Plugin.VideoViewer
         public void LoadAndPlay(string path)
         {
             mediaElement.LoadMediaWithOptions(path, ":avcodec-hw=dxva2");
-            mediaElement.Volume = _context.GetSetting("Volume", 50);
+            mediaElement.Volume = SettingHelper.Get("Volume", 50);
 
             mediaElement.Play();
         }