diff --git a/GUI/FileErrorDialog.xaml.cs b/GUI/FileErrorDialog.xaml.cs
index 7fcb5725..420e9129 100644
--- a/GUI/FileErrorDialog.xaml.cs
+++ b/GUI/FileErrorDialog.xaml.cs
@@ -16,6 +16,16 @@ namespace GARbro.GUI
             this.DataContext = new ViewModel { Title = title, Text = error_text };
         }
 
+        new public FileErrorDialogResult ShowDialog ()
+        {
+            bool dialog_result = base.ShowDialog() ?? false;
+            return new FileErrorDialogResult
+            {
+                Continue     = dialog_result,
+                IgnoreErrors = IgnoreErrors.IsChecked ?? false
+            };
+        }
+
         private void ContinueButton_Click (object sender, RoutedEventArgs e)
         {
             this.DialogResult = true;
@@ -73,4 +83,10 @@ namespace GARbro.GUI
             public event EventHandler CanExecuteChanged;
         }
     }
+
+    public struct FileErrorDialogResult
+    {
+        public bool Continue;
+        public bool IgnoreErrors;
+    }
 }
diff --git a/GUI/FileExistsDialog.xaml b/GUI/FileExistsDialog.xaml
new file mode 100644
index 00000000..bb1c2689
--- /dev/null
+++ b/GUI/FileExistsDialog.xaml
@@ -0,0 +1,21 @@
+<w:ModalWindow x:Class="GARbro.GUI.FileExistsDialog"
+               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+               xmlns:w="clr-namespace:Rnd.Windows"
+               xmlns:s="clr-namespace:GARbro.GUI.Strings"
+               Title="File already exists" ShowInTaskbar="False" WindowStartupLocation="CenterOwner"
+               ResizeMode="NoResize" SizeToContent="WidthAndHeight" ShowActivated="True"
+               Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}">
+    <StackPanel Orientation="Vertical">
+        <TextBlock x:Name="Notice" Text="File named {0} already exists in destination folder." Margin="10"/>
+        <TextBlock Text="{x:Static s:guiStrings.LabelDuplicateFileQuestion}" Margin="10"/>
+        <Separator/>
+        <CheckBox x:Name="ApplyToAll" Content="{x:Static s:guiStrings.LabelApplyToAll}" Margin="10"/>
+        <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Center">
+            <Button Content="{x:Static s:guiStrings.ButtonSkip}" Margin="10" Width="75" Height="25" IsDefault="True" Click="SkipButton_Click"/>
+            <Button Content="{x:Static s:guiStrings.ButtonOverwrite}" Margin="10" Width="75" Height="25" Click="OverwriteButton_Click"/>
+            <Button Content="{x:Static s:guiStrings.ButtonRename}" Margin="10" Width="75" Height="25" Click="RenameButton_Click"/>
+            <Button Content="{x:Static s:guiStrings.ButtonAbort}" Margin="10" Width="75" Height="25" IsCancel="True" Click="AbortButton_Click"/>
+        </StackPanel>
+    </StackPanel>
+</w:ModalWindow>
diff --git a/GUI/FileExistsDialog.xaml.cs b/GUI/FileExistsDialog.xaml.cs
new file mode 100644
index 00000000..b308f1df
--- /dev/null
+++ b/GUI/FileExistsDialog.xaml.cs
@@ -0,0 +1,72 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace GARbro.GUI
+{
+    /// <summary>
+    /// Interaction logic for FileExistsDialog.xaml
+    /// </summary>
+    public partial class FileExistsDialog : Rnd.Windows.ModalWindow
+    {
+        public FileExistsDialog (string title, string text)
+        {
+            InitializeComponent ();
+            this.Title = title;
+            this.Notice.Text = text;
+        }
+
+        new public FileExistsDialogResult ShowDialog ()
+        {
+            bool dialog_result = base.ShowDialog() ?? false;
+            if (!dialog_result)
+                FileAction = ExistingFileAction.Abort;
+            return new FileExistsDialogResult
+            {
+                Action      = FileAction,
+                ApplyToAll  = ApplyToAll.IsChecked ?? false
+            };
+        }
+
+        public ExistingFileAction FileAction { get; set; }
+
+        private void SkipButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+            this.FileAction = ExistingFileAction.Skip;
+        }
+
+        private void OverwriteButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+            this.FileAction = ExistingFileAction.Overwrite;
+        }
+
+        private void RenameButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+            this.FileAction = ExistingFileAction.Rename;
+        }
+
+        private void AbortButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = false;
+            this.FileAction = ExistingFileAction.Abort;
+        }
+    }
+
+    public enum ExistingFileAction
+    {
+        Skip,
+        Overwrite,
+        Rename,
+        Abort
+    }
+
+    public struct FileExistsDialogResult
+    {
+        public ExistingFileAction Action;
+        public bool ApplyToAll;
+    }
+}
diff --git a/GUI/GARbro.GUI.csproj b/GUI/GARbro.GUI.csproj
index bf565e0e..1a19b592 100644
--- a/GUI/GARbro.GUI.csproj
+++ b/GUI/GARbro.GUI.csproj
@@ -147,6 +147,9 @@
     <Compile Include="FileErrorDialog.xaml.cs">
       <DependentUpon>FileErrorDialog.xaml</DependentUpon>
     </Compile>
+    <Compile Include="FileExistsDialog.xaml.cs">
+      <DependentUpon>FileExistsDialog.xaml</DependentUpon>
+    </Compile>
     <Compile Include="GarConvert.cs" />
     <Compile Include="GarCreate.cs" />
     <Compile Include="GarExtract.cs" />
@@ -203,6 +206,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="FileExistsDialog.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
diff --git a/GUI/GarConvert.cs b/GUI/GarConvert.cs
index 1d61da9d..57365053 100644
--- a/GUI/GarConvert.cs
+++ b/GUI/GarConvert.cs
@@ -143,42 +143,38 @@ namespace GARbro.GUI
         void ConvertWorker (object sender, DoWorkEventArgs e)
         {
             m_pending_error = null;
-            try
+            int total = m_source.Count();
+            int i = 0;
+            foreach (var entry in m_source)
             {
-                int total = m_source.Count();
-                int i = 0;
-                foreach (var entry in m_source)
+                if (m_progress_dialog.CancellationPending)
                 {
-                    if (m_progress_dialog.CancellationPending)
-                        throw new OperationCanceledException();
-                    var filename = entry.Name;
-                    int progress = i++*100/total;
-                    m_progress_dialog.ReportProgress (progress, string.Format (guiStrings.MsgConvertingFile,
-                        Path.GetFileName (filename)), null);
-                    try
-                    {
-                        if ("image" == entry.Type)
-                            ConvertImage (filename);
-                        else if ("audio" == entry.Type)
-                            ConvertAudio (filename);
-                    }
-                    catch (NotImplementedException X)
-                    {
-                        // target format creation not implemented
-                        m_pending_error = X;
-                        break;
-                    }
-                    catch (Exception X)
-                    {
-                        if (!IgnoreErrors)
-                            throw;
-                        m_failed.Add (Tuple.Create (Path.GetFileName (filename), X.Message));
-                    }
+                    m_pending_error = new OperationCanceledException();
+                    break;
+                }
+                var filename = entry.Name;
+                int progress = i++*100/total;
+                m_progress_dialog.ReportProgress (progress, string.Format (guiStrings.MsgConvertingFile,
+                    Path.GetFileName (filename)), null);
+                try
+                {
+                    if ("image" == entry.Type)
+                        ConvertImage (filename);
+                    else if ("audio" == entry.Type)
+                        ConvertAudio (filename);
+                }
+                catch (Exception X)
+                {
+                    if (!IgnoreErrors)
+                    {
+                        var error_text = string.Format (guiStrings.TextErrorConverting, entry.Name, X.Message);
+                        var result = m_main.Dispatcher.Invoke (() => m_main.ShowErrorDialog (guiStrings.TextMediaConvertError, error_text, m_progress_dialog.GetWindowHandle()));
+                        if (!result.Continue)
+                            break;
+                        IgnoreErrors = result.IgnoreErrors;
+                    }
+                    m_failed.Add (Tuple.Create (Path.GetFileName (filename), X.Message));
                 }
-            }
-            catch (Exception X)
-            {
-                m_pending_error = X;
             }
         }
 
diff --git a/GUI/GarExtract.cs b/GUI/GarExtract.cs
index be5a0a10..be378361 100644
--- a/GUI/GarExtract.cs
+++ b/GUI/GarExtract.cs
@@ -304,8 +304,10 @@ namespace GARbro.GUI
                     if (!m_ignore_errors)
                     {
                         var error_text = string.Format (guiStrings.TextErrorExtracting, entry.Name, X.Message);
-                        if (!m_main.Dispatcher.Invoke (() => ShowErrorDialog (error_text)))
+                        var result = m_main.Dispatcher.Invoke (() => m_main.ShowErrorDialog (guiStrings.TextExtractionError, error_text, m_progress_dialog.GetWindowHandle()));
+                        if (!result.Continue)
                             break;
+                        m_ignore_errors = result.IgnoreErrors;
                     }
                     ++m_skip_count;
                 }
@@ -411,31 +413,6 @@ namespace GARbro.GUI
             throw new IOException ("File aready exists");
         }
 
-        bool ShowErrorDialog (string error_text)
-        {
-            var dialog = new FileErrorDialog (guiStrings.TextExtractionError, error_text);
-            var progress_dialog_hwnd = m_progress_dialog.GetWindowHandle(); 
-            if (progress_dialog_hwnd != IntPtr.Zero)
-            {
-                var native_dialog = new WindowInteropHelper (dialog);
-                native_dialog.Owner = progress_dialog_hwnd;
-                NativeMethods.EnableWindow (progress_dialog_hwnd, false);
-                EventHandler on_closed = null;
-                on_closed = (s, e) => {
-                    NativeMethods.EnableWindow (progress_dialog_hwnd, true);
-                    dialog.Closed -= on_closed;
-                };
-                dialog.Closed += on_closed;
-            }
-            else
-            {
-                dialog.Owner = m_main;
-            }
-            bool dialog_result = dialog.ShowDialog() ?? false;
-            m_ignore_errors = dialog.IgnoreErrors.IsChecked ?? false;
-            return dialog_result;
-        }
-
         void OnExtractComplete (object sender, RunWorkerCompletedEventArgs e)
         {
             m_extract_in_progress = false;
diff --git a/GUI/MainWindow.xaml.cs b/GUI/MainWindow.xaml.cs
index 6adab05c..3d45960e 100644
--- a/GUI/MainWindow.xaml.cs
+++ b/GUI/MainWindow.xaml.cs
@@ -1,6 +1,6 @@
 // Game Resource Browser
 //
-// Copyright (C) 2014-2015 by morkt
+// Copyright (C) 2014-2017 by morkt
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to
@@ -35,6 +35,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Input;
+using System.Windows.Interop;
 using System.Windows.Threading;
 using Microsoft.VisualBasic.FileIO;
 using GARbro.GUI.Properties;
@@ -195,6 +196,40 @@ namespace GARbro.GUI
             Dispatcher.Invoke (() => MessageBox.Show (this, message, title, MessageBoxButton.OK, MessageBoxImage.Error));
         }
 
+        internal FileErrorDialogResult ShowErrorDialog (string error_title, string error_text, IntPtr parent_hwnd)
+        {
+            var dialog = new FileErrorDialog (error_title, error_text);
+            SetModalWindowParent (dialog, parent_hwnd);
+            return dialog.ShowDialog();
+        }
+
+        internal FileExistsDialogResult ShowFileExistsDialog (string title, string text, IntPtr parent_hwnd)
+        {
+            var dialog = new FileExistsDialog (title, text);
+            SetModalWindowParent (dialog, parent_hwnd);
+            return dialog.ShowDialog();
+        }
+
+        private void SetModalWindowParent (Window dialog, IntPtr parent_hwnd)
+        {
+            if (parent_hwnd != IntPtr.Zero)
+            {
+                var native_dialog = new WindowInteropHelper (dialog);
+                native_dialog.Owner = parent_hwnd;
+                NativeMethods.EnableWindow (parent_hwnd, false);
+                EventHandler on_closed = null;
+                on_closed = (s, e) => {
+                    NativeMethods.EnableWindow (parent_hwnd, true);
+                    dialog.Closed -= on_closed;
+                };
+                dialog.Closed += on_closed;
+            }
+            else
+            {
+                dialog.Owner = this;
+            }
+        }
+
         const int MaxRecentFiles = 9;
         LinkedList<string> m_recent_files;
 
diff --git a/GUI/Strings/guiStrings.Designer.cs b/GUI/Strings/guiStrings.Designer.cs
index b03f1416..cd3ff941 100644
--- a/GUI/Strings/guiStrings.Designer.cs
+++ b/GUI/Strings/guiStrings.Designer.cs
@@ -114,6 +114,33 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to _Overwrite.
+        /// </summary>
+        public static string ButtonOverwrite {
+            get {
+                return ResourceManager.GetString("ButtonOverwrite", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to _Rename.
+        /// </summary>
+        public static string ButtonRename {
+            get {
+                return ResourceManager.GetString("ButtonRename", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to _Skip.
+        /// </summary>
+        public static string ButtonSkip {
+            get {
+                return ResourceManager.GetString("ButtonSkip", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to _Close.
         /// </summary>
@@ -312,6 +339,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to A_pply to all duplicate files.
+        /// </summary>
+        public static string LabelApplyToAll {
+            get {
+                return ResourceManager.GetString("LabelApplyToAll", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Archive format.
         /// </summary>
@@ -366,6 +402,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to What should be done?.
+        /// </summary>
+        public static string LabelDuplicateFileQuestion {
+            get {
+                return ResourceManager.GetString("LabelDuplicateFileQuestion", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Encoding.
         /// </summary>
@@ -963,6 +1008,17 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Error occured while converting file
+        ///{0}
+        ///{1}.
+        /// </summary>
+        public static string TextErrorConverting {
+            get {
+                return ResourceManager.GetString("TextErrorConverting", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Error occured while extracting file
         ///{0}
diff --git a/GUI/Strings/guiStrings.ko-KR.resx b/GUI/Strings/guiStrings.ko-KR.resx
index b3009ef5..7047b2fb 100644
--- a/GUI/Strings/guiStrings.ko-KR.resx
+++ b/GUI/Strings/guiStrings.ko-KR.resx
@@ -474,4 +474,30 @@
     <value>File extraction error</value>
     <comment>translation pending</comment>
   </data>
+  <data name="ButtonOverwrite" xml:space="preserve">
+    <value>Overwrite</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="ButtonRename" xml:space="preserve">
+    <value>Rename</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="ButtonSkip" xml:space="preserve">
+    <value>Skip</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="LabelApplyToAll" xml:space="preserve">
+    <value>Apply to all duplicate files</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="LabelDuplicateFileQuestion" xml:space="preserve">
+    <value>What should be done?</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="TextErrorConverting" xml:space="preserve">
+    <value>Error occured while converting file
+{0}
+{1}</value>
+    <comment>translation pending</comment>
+  </data>
 </root>
\ No newline at end of file
diff --git a/GUI/Strings/guiStrings.resx b/GUI/Strings/guiStrings.resx
index f08e7fab..59310985 100644
--- a/GUI/Strings/guiStrings.resx
+++ b/GUI/Strings/guiStrings.resx
@@ -474,4 +474,24 @@ Overwrite?</value>
   <data name="TextExtractionError" xml:space="preserve">
     <value>File extraction error</value>
   </data>
+  <data name="ButtonOverwrite" xml:space="preserve">
+    <value>_Overwrite</value>
+  </data>
+  <data name="ButtonRename" xml:space="preserve">
+    <value>_Rename</value>
+  </data>
+  <data name="ButtonSkip" xml:space="preserve">
+    <value>_Skip</value>
+  </data>
+  <data name="LabelApplyToAll" xml:space="preserve">
+    <value>A_pply to all duplicate files</value>
+  </data>
+  <data name="LabelDuplicateFileQuestion" xml:space="preserve">
+    <value>What should be done?</value>
+  </data>
+  <data name="TextErrorConverting" xml:space="preserve">
+    <value>Error occured while converting file
+{0}
+{1}</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/GUI/Strings/guiStrings.ru-RU.resx b/GUI/Strings/guiStrings.ru-RU.resx
index 83b3bed3..5103adff 100644
--- a/GUI/Strings/guiStrings.ru-RU.resx
+++ b/GUI/Strings/guiStrings.ru-RU.resx
@@ -495,4 +495,24 @@
   <data name="TextExtractionError" xml:space="preserve">
     <value>Ошибка извлечения файла</value>
   </data>
+  <data name="ButtonOverwrite" xml:space="preserve">
+    <value>Заменить</value>
+  </data>
+  <data name="ButtonRename" xml:space="preserve">
+    <value>Переименовать</value>
+  </data>
+  <data name="ButtonSkip" xml:space="preserve">
+    <value>Пропустить</value>
+  </data>
+  <data name="LabelApplyToAll" xml:space="preserve">
+    <value>Применить ко всем совпадающим файлам</value>
+  </data>
+  <data name="LabelDuplicateFileQuestion" xml:space="preserve">
+    <value>Что делать?</value>
+  </data>
+  <data name="TextErrorConverting" xml:space="preserve">
+    <value>Не удадось конвертировать файл
+{0}
+{1}</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/GUI/Strings/guiStrings.zh-Hans.resx b/GUI/Strings/guiStrings.zh-Hans.resx
index beefb52d..7f6e2c00 100644
--- a/GUI/Strings/guiStrings.zh-Hans.resx
+++ b/GUI/Strings/guiStrings.zh-Hans.resx
@@ -476,4 +476,30 @@
     <value>File extraction error</value>
     <comment>translation pending</comment>
   </data>
+  <data name="ButtonOverwrite" xml:space="preserve">
+    <value>Overwrite</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="ButtonRename" xml:space="preserve">
+    <value>Rename</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="ButtonSkip" xml:space="preserve">
+    <value>Skip</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="LabelApplyToAll" xml:space="preserve">
+    <value>Apply to all duplicate files</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="LabelDuplicateFileQuestion" xml:space="preserve">
+    <value>What should be done?</value>
+    <comment>translation pending</comment>
+  </data>
+  <data name="TextErrorConverting" xml:space="preserve">
+    <value>Error occured while converting file
+{0}
+{1}</value>
+    <comment>translation pending</comment>
+  </data>
 </root>
\ No newline at end of file