diff --git a/src/MSDIAL5/MsdialGuiApp/Model/Core/MainWindowModel.cs b/src/MSDIAL5/MsdialGuiApp/Model/Core/MainWindowModel.cs
index f1c8ad78a..61fd590bf 100644
--- a/src/MSDIAL5/MsdialGuiApp/Model/Core/MainWindowModel.cs
+++ b/src/MSDIAL5/MsdialGuiApp/Model/Core/MainWindowModel.cs
@@ -35,8 +35,8 @@ public MainWindowModel(IMessageBroker broker) {
                 _settings.PreviousProjects = new List<ProjectCrumb>();
                 _settings.Save();
             }
-            _previousProjects = _settings.PreviousProjects;
-            PreviousProjects = _previousProjects.AsReadOnly();
+            _previousProjects = new ObservableCollection<ProjectCrumb>(_settings.PreviousProjects);
+            PreviousProjects = new ReadOnlyObservableCollection<ProjectCrumb>(_previousProjects);
 
             //InternalMsfinderSettingModel = new InternalMsfinderSettingModel(IonMode.Negative);
         }
@@ -61,19 +61,25 @@ public ProjectSettingModel ProjectSetting {
         }
         private ProjectSettingModel projectSetting;
 
-        public ReadOnlyCollection<ProjectCrumb> PreviousProjects { get; }
-        private readonly List<ProjectCrumb> _previousProjects;
+        public ReadOnlyObservableCollection<ProjectCrumb> PreviousProjects { get; }
+        private readonly ObservableCollection<ProjectCrumb> _previousProjects;
 
         private Task SetNewProject(IProjectModel project) {
             CurrentProject = project;
             ProjectSetting = new ProjectSettingModel(SetNewProject, _broker);
             var currentCrumb = new ProjectCrumb(project.Storage.ProjectParameter);
             if (_previousProjects.Any(currentCrumb.MaybeSame)) {
-                _previousProjects.RemoveAll(currentCrumb.MaybeSame);
+                var resembleProjects = _previousProjects.Where(currentCrumb.MaybeSame).ToList();
+                foreach (var resembleProject in resembleProjects)
+                {
+                    _previousProjects.Remove(resembleProject);
+                }
             }
             _previousProjects.Insert(0, currentCrumb);
             if (_previousProjects.Count > 50) {
-                _previousProjects.RemoveRange(50, _previousProjects.Count - 50);
+                while (_previousProjects.Count > 50) {
+                    _previousProjects.RemoveAt(_previousProjects.Count - 1);
+                }
             }
             return Task.CompletedTask;
         }
@@ -83,7 +89,21 @@ public async Task SaveAsync() {
                 return;
             }
             using (nowSaving.ProcessStart()) {
-                await CurrentProject.SaveAsync().ConfigureAwait(false);
+                await CurrentProject.SaveAsync().ConfigureAwait(true);
+                var currentCrumb = new ProjectCrumb(CurrentProject.Storage.ProjectParameter);
+                if (_previousProjects.Any(currentCrumb.MaybeSame))
+                {
+                    _previousProjects.Remove(_previousProjects.First(currentCrumb.MaybeSame));
+                }
+                _previousProjects.Insert(0, currentCrumb);
+                if (_previousProjects.Count > 50)
+                {
+                    while (_previousProjects.Count > 50)
+                    {
+                        _previousProjects.RemoveAt(_previousProjects.Count - 1);
+                    }
+                }
+                _settings.PreviousProjects = PreviousProjects.ToList();
                 _settings.Save();
             }
         }
@@ -123,11 +143,17 @@ public async Task LoadAsync() {
                     CurrentProject = loadedProject;
                     var currentCrumb = new ProjectCrumb(loadedProject.Storage.ProjectParameter);
                     if (_previousProjects.Any(currentCrumb.MaybeSame)) {
-                        _previousProjects.RemoveAll(currentCrumb.MaybeSame);
+                        var resembleProjects = _previousProjects.Where(currentCrumb.MaybeSame).ToList();
+                        foreach (var resembleProject in resembleProjects)
+                        {
+                            _previousProjects.Remove(resembleProject);
+                        }
                     }
                     _previousProjects.Insert(0, currentCrumb);
                     if (_previousProjects.Count > 50) {
-                        _previousProjects.RemoveRange(50, _previousProjects.Count - 50);
+                        while (_previousProjects.Count > 50) {
+                            _previousProjects.RemoveAt(_previousProjects.Count - 1);
+                        }
                     }
                 }
                 catch {
@@ -153,11 +179,17 @@ public async Task LoadProjectAsync(ProjectCrumb projectCrumb) {
                     CurrentProject = loadedProject;
                     var currentCrumb = new ProjectCrumb(loadedProject.Storage.ProjectParameter);
                     if (_previousProjects.Any(currentCrumb.MaybeSame)) {
-                        _previousProjects.RemoveAll(currentCrumb.MaybeSame);
+                        var resembleProjects = _previousProjects.Where(currentCrumb.MaybeSame).ToList();
+                        foreach (var resembleProject in resembleProjects)
+                        {
+                            _previousProjects.Remove(resembleProject);
+                        }
                     }
                     _previousProjects.Insert(0, currentCrumb);
                     if (_previousProjects.Count > 50) {
-                        _previousProjects.RemoveRange(50, _previousProjects.Count - 50);
+                        while (_previousProjects.Count > 50) {
+                            _previousProjects.RemoveAt(_previousProjects.Count - 1);
+                        }
                     }
                 }
                 catch {
@@ -168,5 +200,27 @@ await Application.Current.Dispatcher.InvokeAsync(() => {
                 }
             }
         }
+
+        public async Task DeleteProjectAsync(ProjectCrumb projectCrumb){
+            using (nowLoading.ProcessStart()){
+                try
+                {
+                    var resembleProjects = _previousProjects.Where(projectCrumb.MaybeSame).ToList();
+                    foreach (var resembleProject in resembleProjects)
+                    {
+                        _previousProjects.Remove(resembleProject);
+                    }
+                    _settings.PreviousProjects = PreviousProjects.ToList();
+                    _settings.Save();
+                }
+                catch
+                {
+                    await Application.Current.Dispatcher.InvokeAsync(() => {
+                        MessageBox.Show("Failed to delete project.\nPlease check your project.");
+                        return Task.CompletedTask;
+                    });
+                }
+            }
+        }
     }
 }
diff --git a/src/MSDIAL5/MsdialGuiApp/View/Core/MainWindow.xaml b/src/MSDIAL5/MsdialGuiApp/View/Core/MainWindow.xaml
index b227afab4..ef991d241 100644
--- a/src/MSDIAL5/MsdialGuiApp/View/Core/MainWindow.xaml
+++ b/src/MSDIAL5/MsdialGuiApp/View/Core/MainWindow.xaml
@@ -8,6 +8,7 @@
               xmlns:properties="clr-namespace:CompMs.App.Msdial.Properties"
               xmlns:util="clr-namespace:CompMs.App.Msdial.Utility"
               xmlns:progressbar="clr-namespace:CompMs.Graphics.UI.ProgressBar;assembly=ChartDrawing"
+              xmlns:mvvm="clr-namespace:CompMs.CommonMVVM;assembly=CommonMVVM"
               mc:Ignorable="d"
               Icon="/Resources/msdial_icon.ico"
               d:DataContext="{d:DesignInstance Type={x:Type vm:MainWindowVM}}"
@@ -138,6 +139,9 @@
                 <ItemsControl ItemsSource="{Binding PreviousProjects}"
                               BorderThickness="0.5"
                               BorderBrush="Black">
+                    <ItemsControl.Resources>
+                            <mvvm:BindingProxy x:Key="delete" Data="{Binding Path=DeletePreviousProjectCommand}"/>
+                        </ItemsControl.Resources>
                     <ItemsControl.ItemTemplate>
                         <DataTemplate>
                             <Button Command="{Binding Path=DataContext.OpenPreviousProjectCommand, RelativeSource={RelativeSource AncestorType=ItemsControl}}"
@@ -161,7 +165,14 @@
                                         <TextBlock Text="{Binding FilePath}"/>
                                     </ToolTip>
                                 </Button.ToolTip>
-                            </Button>
+                                    <Button.ContextMenu>
+                                        <ContextMenu>
+                                            <MenuItem Header="Remove from recent projects"
+                                                      Command="{Binding Data, Source={StaticResource delete}}"
+                                                      CommandParameter="{Binding}"/>
+                                        </ContextMenu>
+                                    </Button.ContextMenu>
+                                </Button>
                         </DataTemplate>
                     </ItemsControl.ItemTemplate>
                 </ItemsControl>
diff --git a/src/MSDIAL5/MsdialGuiApp/ViewModel/Core/MainWindowVM.cs b/src/MSDIAL5/MsdialGuiApp/ViewModel/Core/MainWindowVM.cs
index b5ca081fa..ca3d14648 100644
--- a/src/MSDIAL5/MsdialGuiApp/ViewModel/Core/MainWindowVM.cs
+++ b/src/MSDIAL5/MsdialGuiApp/ViewModel/Core/MainWindowVM.cs
@@ -80,6 +80,9 @@ public MainWindowVM(IWindowService<PeakSpotTableViewModelBase> peakSpotTableServ
             OpenPreviousProjectCommand = new AsyncReactiveCommand<ProjectCrumb>()
                 .WithSubscribe(Model.LoadProjectAsync)
                 .AddTo(Disposables);
+            DeletePreviousProjectCommand = new AsyncReactiveCommand<ProjectCrumb>()
+                .WithSubscribe(Model.DeleteProjectAsync)
+                .AddTo(Disposables);
 
             _taskProgressCollection = new TaskProgressCollection();
             _taskProgressCollection.ShowWhileSwitchOn(Model.NowSaving, "Saving...").AddTo(Disposables);
@@ -177,7 +180,8 @@ private async Task ExecuteAlignmentMethodProcess() {
 
         public AsyncReactiveCommand OpenProjectCommand { get; }
         public AsyncReactiveCommand<ProjectCrumb> OpenPreviousProjectCommand { get; }
-        public ReadOnlyCollection<ProjectCrumb> PreviousProjects => Model.PreviousProjects;
+        public AsyncReactiveCommand<ProjectCrumb> DeletePreviousProjectCommand { get; }
+        public ReadOnlyObservableCollection<ProjectCrumb> PreviousProjects => Model.PreviousProjects;
 
         public AsyncReactiveCommand SaveProjectCommand { get; }
         public AsyncReactiveCommand SaveAsProjectCommand { get; }