diff --git a/README.md b/README.md
index 3c3319d..505adef 100644
--- a/README.md
+++ b/README.md
@@ -28,4 +28,4 @@ The licence for this repository is a [GNU Affero General Public Licence version
 ## Special Thanks
 - Icon: [Yoshi](https://github.com/yoshiask)
 - UI: [Leisvan](https://twitter.com/leisvanCT)
-- Code Help: [Sergio](https://github.com/Sergio0694)
\ No newline at end of file
+- Resharper Help: [Sergio](https://github.com/Sergio0694)
diff --git a/Yugen.Mosaic.Uwp/ViewModels/MainViewModel.cs b/Yugen.Mosaic.Uwp/ViewModels/MainViewModel.cs
index 60985ba..b6330b8 100644
--- a/Yugen.Mosaic.Uwp/ViewModels/MainViewModel.cs
+++ b/Yugen.Mosaic.Uwp/ViewModels/MainViewModel.cs
@@ -1,10 +1,12 @@
 using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.UI.Xaml.Controls;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using System.Windows.Input;
 using Windows.Storage;
@@ -60,8 +62,8 @@ public class MainViewModel : ViewModelBase
         private ICommand _helpCommand;
         private ICommand _settingsCommand;
         private ICommand _teachingTipActionButtonCommand;
-        private ICommand _teachingTipClosingCommand;
-        private ICommand _teachingTipClosedCommand;
+        //private ICommand _teachingTipClosingCommand;
+        //private ICommand _teachingTipClosedCommand;
 
         public MainViewModel()
         {
@@ -196,8 +198,8 @@ public int Progress
         public ICommand HelpCommand => _helpCommand ?? (_helpCommand = new RelayCommand(HelpCommandBehavior));
         public ICommand SettingsCommand => _settingsCommand ?? (_settingsCommand = new AsyncRelayCommand(SettingsCommandBehavior));
         public ICommand TeachingTipActionButtonCommand => _teachingTipActionButtonCommand ?? (_teachingTipActionButtonCommand = new RelayCommand(TeachingTipActionButtonCommandBehavior));
-        public ICommand TeachingTipClosingCommand => _teachingTipClosingCommand ?? (_teachingTipClosingCommand = new RelayCommand(TeachingTipClosingCommandBehavior));
-        public ICommand TeachingTipClosedCommand => _teachingTipClosedCommand ?? (_teachingTipClosedCommand = new RelayCommand(TeachingTipClosedCommandBehavior));
+        //public ICommand TeachingTipClosingCommand => _teachingTipClosingCommand ?? (_teachingTipClosingCommand = new RelayCommand(TeachingTipClosingCommandBehavior));
+        //public ICommand TeachingTipClosedCommand => _teachingTipClosedCommand ?? (_teachingTipClosedCommand = new RelayCommand(TeachingTipClosedCommandBehavior));
 
         private Size OutputSize => new Size(_outputWidth, _outputHeight);
         private Size TileSize => new Size(_tileWidth, _tileHeight);
@@ -233,7 +235,7 @@ public void TeachingTipActionButtonCommandBehavior()
             IsTeachingTipOpen = false;
         }
 
-        public void TeachingTipClosingCommandBehavior()
+        public void TeachingTip_Closing(TeachingTip sender, TeachingTipClosingEventArgs args)
         {
             TeachingTipTitle = "";
             TeachingTipSubTitle = "";
@@ -241,7 +243,7 @@ public void TeachingTipClosingCommandBehavior()
             IsTeachingTipOpen = false;
         }
 
-        public void TeachingTipClosedCommandBehavior() => ShowTeachingTip();
+        public void TeachingTip_Closed(TeachingTip sender, TeachingTipClosedEventArgs args) => ShowTeachingTip();
 
         private async Task AddMasterImmageCommandBehavior()
         {
@@ -307,7 +309,7 @@ private async Task AddTilesFolderCommandBehavior()
                 SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.PicturesLibrary
             };
             folderPicker.FileTypeFilter.Add(FileFormat.Jpg.GetStringRepresentation());
-            folderPicker.FileTypeFilter.Add(FileFormat.Jpg.GetStringRepresentation());
+            folderPicker.FileTypeFilter.Add(FileFormat.Jpeg.GetStringRepresentation());
             folderPicker.FileTypeFilter.Add(FileFormat.Png.GetStringRepresentation());
 
             StorageFolder folder = await folderPicker.PickSingleFolderAsync();
@@ -318,11 +320,14 @@ private async Task AddTilesFolderCommandBehavior()
                 Windows.Storage.AccessCache.StorageApplicationPermissions.FutureAccessList.AddOrReplace("PickedFolderToken", folder);
 
                 var files = await folder.GetFilesAsync();
-                await AddTiles(files);
+                var filteredFiles = files.Where(file => file.FileType.Contains(FileFormat.Jpg.GetStringRepresentation(), StringComparison.InvariantCultureIgnoreCase)
+                                                     || file.FileType.Contains(FileFormat.Jpeg.GetStringRepresentation(), StringComparison.InvariantCultureIgnoreCase)
+                                                     || file.FileType.Contains(FileFormat.Png.GetStringRepresentation(), StringComparison.InvariantCultureIgnoreCase));
+                await AddTiles(filteredFiles);
             }
         }
 
-        private async Task AddTiles(IReadOnlyList<StorageFile> files)
+        private async Task AddTiles(IEnumerable<StorageFile> files)
         {
             IsButtonEnabled = false;
             IsIndeterminateLoading = true;
diff --git a/Yugen.Mosaic.Uwp/Views/MainPage.xaml b/Yugen.Mosaic.Uwp/Views/MainPage.xaml
index 77b4d77..45955fd 100644
--- a/Yugen.Mosaic.Uwp/Views/MainPage.xaml
+++ b/Yugen.Mosaic.Uwp/Views/MainPage.xaml
@@ -420,19 +420,21 @@
         </Grid>
 
         <muxc:TeachingTip x:Uid="MainTeachingTip"
+                          Closing="{x:Bind ViewModel.TeachingTip_Closing}"
+                          Closed="{x:Bind ViewModel.TeachingTip_Closed}"
                           IsOpen="{x:Bind ViewModel.IsTeachingTipOpen, Mode=OneWay}"
                           Target="{x:Bind ViewModel.TeachingTipTarget, Mode=OneWay}"
                           Title="{x:Bind ViewModel.TeachingTipTitle, Mode=OneWay}"
                           Subtitle="{x:Bind ViewModel.TeachingTipSubTitle, Mode=OneWay}"
                           ActionButtonCommand="{x:Bind ViewModel.TeachingTipActionButtonCommand}">
-            <interactivity:Interaction.Behaviors>
+            <!--<interactivity:Interaction.Behaviors>
                 <core:EventTriggerBehavior EventName="Closed">
                     <core:InvokeCommandAction Command="{x:Bind ViewModel.TeachingTipClosedCommand}" />
                 </core:EventTriggerBehavior>
                 <core:EventTriggerBehavior EventName="Closing">
                     <core:InvokeCommandAction Command="{x:Bind ViewModel.TeachingTipClosingCommand}" />
                 </core:EventTriggerBehavior>
-            </interactivity:Interaction.Behaviors>
+            </interactivity:Interaction.Behaviors>-->
         </muxc:TeachingTip>
 
     </Grid>
diff --git a/Yugen.Mosaic.Uwp/Yugen.Mosaic.Uwp.csproj b/Yugen.Mosaic.Uwp/Yugen.Mosaic.Uwp.csproj
index a1ba929..40fd417 100644
--- a/Yugen.Mosaic.Uwp/Yugen.Mosaic.Uwp.csproj
+++ b/Yugen.Mosaic.Uwp/Yugen.Mosaic.Uwp.csproj
@@ -253,7 +253,7 @@
       <Version>2.4.2</Version>
     </PackageReference>
     <PackageReference Include="SixLabors.ImageSharp">
-      <Version>1.0.0-rc0001</Version>
+      <Version>1.0.0-rc0003</Version>
     </PackageReference>
     <PackageReference Include="WriteableBitmapEx">
       <Version>1.6.7</Version>