diff --git a/Core/Models/TagDatabase/TagDatabase.DeleteMethods.cs b/Core/Models/TagDatabase/TagDatabase.DeleteMethods.cs
index 9b4f7ea..d517dcc 100644
--- a/Core/Models/TagDatabase/TagDatabase.DeleteMethods.cs
+++ b/Core/Models/TagDatabase/TagDatabase.DeleteMethods.cs
@@ -69,7 +69,7 @@ partial class TagDatabase
                 tag.Parents.Remove(targetTag.Name);
             });
         
-        Tag cachedTag = this.Tags.FirstOrDefault(t => t.Id == targetTag.Id);
+        Tag? cachedTag = this.Tags.FirstOrDefault(t => t.Id == targetTag.Id);
         if (cachedTag != null)
         {
             this.Tags.Remove(cachedTag);
diff --git a/Core/TagHierarchyManager.csproj b/Core/TagHierarchyManager.csproj
index 9127e84..7dcc757 100644
--- a/Core/TagHierarchyManager.csproj
+++ b/Core/TagHierarchyManager.csproj
@@ -6,7 +6,6 @@
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <IsTestProject>false</IsTestProject>
-        <GenerateDocumentationFile>true</GenerateDocumentationFile>
         <IsTrimmable>true</IsTrimmable>
     </PropertyGroup>
 
diff --git a/UI/ViewModels/ErrorDialogViewModel.cs b/UI/ViewModels/ErrorDialogViewModel.cs
index f91d0cf..c2272d9 100644
--- a/UI/ViewModels/ErrorDialogViewModel.cs
+++ b/UI/ViewModels/ErrorDialogViewModel.cs
@@ -26,7 +26,10 @@ public partial class ErrorDialogViewModel : ViewModelBase
             DataContext = this,
             Title = Resources.ErrorDialogTitle
         };
+        error.Closed += (_, _) => error.DataContext = null;
+        
         var ownerWindow = desktop.Windows.FirstOrDefault(w => w.IsActive) ?? desktop.MainWindow;
-        error.ShowDialog(ownerWindow);
+        if (ownerWindow == null) error.Show();
+        else error.ShowDialog(ownerWindow);
     }
 }
\ No newline at end of file
diff --git a/UI/ViewModels/HierarchyTreeViewModel.cs b/UI/ViewModels/HierarchyTreeViewModel.cs
index b49967f..e33e6f9 100644
--- a/UI/ViewModels/HierarchyTreeViewModel.cs
+++ b/UI/ViewModels/HierarchyTreeViewModel.cs
@@ -48,12 +48,12 @@ public partial class HierarchyTreeViewModel : ViewModelBase, IDisposable
             viewModel = new TagItemViewModel(tag, id =>
                 this._viewModelMap.Values.FirstOrDefault(v => v.Id == id)?.Name);
             this._viewModelMap[key] = viewModel;
-            viewModel.UserEditedTag += (s, e) => this._mainWindow.UnsavedChanges = true;
+            viewModel.UserEditedTag += this.OnUserEditedTag;
         }
 
         return viewModel;
     }
-
+    
     partial void OnSelectedTagChanged(TagItemViewModel? value)
     {
         this._mainWindow.SelectedTag = value;
@@ -67,6 +67,8 @@ public partial class HierarchyTreeViewModel : ViewModelBase, IDisposable
         });
         await this.SyncHierarchyAsync();
     }
+    
+    private void OnUserEditedTag(object? sender, EventArgs e) => this._mainWindow.UnsavedChanges = true;
 
     private void SubscribeToEvents()
     {
@@ -95,7 +97,6 @@ public partial class HierarchyTreeViewModel : ViewModelBase, IDisposable
             }
     }
 
-
     private async Task SyncHierarchyAsync()
     {
         if (this._mainWindow.Database is null) return;
@@ -123,7 +124,11 @@ public partial class HierarchyTreeViewModel : ViewModelBase, IDisposable
         this.SyncCollection(this.TopLevelTags, topLevelViewModels);
 
         var keysToRemove = this._viewModelMap.Keys.Where(k => !activeKeys.Contains(k)).ToList();
-        foreach (var key in keysToRemove) this._viewModelMap.Remove(key);
+        foreach (var key in keysToRemove)
+        {
+            this._viewModelMap[key].UserEditedTag -= this.OnUserEditedTag;
+            this._viewModelMap.Remove(key);
+        }
     }
 
     private void SyncTagRecursive(TagItemViewModel parentVm, ILookup<int, Tag> childrenLookup,
diff --git a/UI/ViewModels/ImportDialogViewModel.cs b/UI/ViewModels/ImportDialogViewModel.cs
index c09bc41..27e5599 100644
--- a/UI/ViewModels/ImportDialogViewModel.cs
+++ b/UI/ViewModels/ImportDialogViewModel.cs
@@ -5,24 +5,19 @@ using TagHierarchyManager.UI.Assets;
 
 namespace TagHierarchyManager.UI.ViewModels;
 
-public partial class ImportDialogViewModel : ViewModelBase
+public partial class ImportDialogViewModel(MainWindowViewModel mainWindow) : ViewModelBase
 {
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(VisibleDatabaseFilePath))]
     [NotifyPropertyChangedFor(nameof(BothFilesSelected))]
-    private string _databaseFilePath;
+    private string _databaseFilePath = string.Empty;
 
     [ObservableProperty] private string _importStatus = string.Empty;
 
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(VisibleTemplateFilePath))]
     [NotifyPropertyChangedFor(nameof(BothFilesSelected))]
-    private string _templateFilePath;
-
-    public ImportDialogViewModel(MainWindowViewModel mainWindow)
-    {
-        this.MainWindow = mainWindow;
-    }
+    private string _templateFilePath = string.Empty;
 
     public event Action? RequestClose;
 
@@ -35,7 +30,7 @@ public partial class ImportDialogViewModel : ViewModelBase
     public string VisibleTemplateFilePath =>
         !string.IsNullOrWhiteSpace(this.TemplateFilePath) ? this.TemplateFilePath : Resources.ImportNoFilePicked;
 
-    private MainWindowViewModel MainWindow { get; }
+    private MainWindowViewModel MainWindow { get; } = mainWindow;
 
     public async Task InitiateImport()
     {
diff --git a/UI/ViewModels/MainWindowViewModel.cs b/UI/ViewModels/MainWindowViewModel.cs
index a14e0f2..92214ec 100644
--- a/UI/ViewModels/MainWindowViewModel.cs
+++ b/UI/ViewModels/MainWindowViewModel.cs
@@ -42,7 +42,7 @@ public partial class MainWindowViewModel : ViewModelBase
     public int TotalTags => this.Database?.Tags.Count ?? 0;
 
     public string WindowTitle =>
-        this.IsDbEnabled
+        this.Database is not null
             ? string.Format(Resources.TitleWithDatabase, this.Database?.Name)
             : Resources.Title;
 
@@ -52,7 +52,7 @@ public partial class MainWindowViewModel : ViewModelBase
         set
         {
             if (this._selectedTag == value || this._isSwitching) return;
-            if (!this.IsDbEnabled && value == null) this._selectedTag = value;
+            if (value == null) this._selectedTag = value;
             if (this._selectedTag != null && this.UnsavedChanges)
             {
                 _ = this.HandleTagSwitchAsync(this._selectedTag, value);
@@ -101,23 +101,14 @@ public partial class MainWindowViewModel : ViewModelBase
 
     public async Task ExportAsync(string path)
     {
+        if (this.Database is null || string.IsNullOrWhiteSpace(path)) return;
         this.IsDbEnabled = false;
-        try
-        {
-            if (this.Database is null || string.IsNullOrWhiteSpace(path)) return;
-
-            var exporter = PickExporterFromFileExt(path);
-            this.StatusBlockText = Resources.StatusBlockExportInProgress;
-            var exportContent = await Task.Run(() => exporter.ExportDatabase(this.Database!));
-            await File.WriteAllTextAsync(path, exportContent);
-            this.IsDbEnabled = true;
-            this.StatusBlockText = string.Format(Resources.StatusBlockExportSuccessful, path);
-        }
-        catch (Exception ex)
-        {
-            this.IsDbEnabled = true;
-            this.ShowErrorDialog(ex.Message);
-        }
+        var exporter = PickExporterFromFileExt(path);
+        this.StatusBlockText = Resources.StatusBlockExportInProgress;
+        var exportContent = await Task.Run(() => exporter.ExportDatabase(this.Database!));
+        await File.WriteAllTextAsync(path, exportContent);
+        this.IsDbEnabled = true;
+        this.StatusBlockText = string.Format(Resources.StatusBlockExportSuccessful, path);
     }
 
     public async Task LoadDatabase(string filePath)
@@ -153,19 +144,12 @@ public partial class MainWindowViewModel : ViewModelBase
     public async Task SaveSelectedTagAsync()
     {
         if (this.SelectedTag is null || this.Database is null) return;
-
-        try
-        {
-            this.SelectedTag.CommitEdit();
-            await this.Database.WriteTagToDatabase(this.SelectedTag.Tag);
-            this.SelectedTag.RefreshParentsString();
-            this.StatusBlockText = string.Format(Resources.StatusBlockTagSaveSuccessful, this.SelectedTag.Name);
-            this.UnsavedChanges = false;
-        }
-        catch (Exception ex)
-        {
-            this.ShowErrorDialog(ex.Message);
-        }
+        
+        this.SelectedTag.CommitEdit();
+        await this.Database.WriteTagToDatabase(this.SelectedTag.Tag);
+        this.SelectedTag.RefreshParentsString();
+        this.StatusBlockText = string.Format(Resources.StatusBlockTagSaveSuccessful, this.SelectedTag.Name);
+        this.UnsavedChanges = false;
     }
 
     public void ShowDatabaseSettings()
@@ -181,12 +165,6 @@ public partial class MainWindowViewModel : ViewModelBase
         dialog.ShowDialog(desktop.MainWindow!);
     }
 
-    public void ShowErrorDialog(string message)
-    {
-        var error = new ErrorDialogViewModel(message);
-        error.ShowDialog();
-    }
-
     public void ShowImportDialog()
     {
         if (Application.Current?.ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime desktop)
@@ -331,6 +309,12 @@ public partial class MainWindowViewModel : ViewModelBase
         });
         Debug.WriteLine($"Database loaded on UI - name: {db.Name}, version: {db.Version}");
     }
+    
+    private void ShowErrorDialog(string message)
+    {
+        var error = new ErrorDialogViewModel(message);
+        error.ShowDialog();
+    }
 
     private void TagDatabase_TagAdded(object? sender, Tag _)
     {
diff --git a/UI/ViewModels/SearchViewModel.cs b/UI/ViewModels/SearchViewModel.cs
index 7f6e957..e884cda 100644
--- a/UI/ViewModels/SearchViewModel.cs
+++ b/UI/ViewModels/SearchViewModel.cs
@@ -9,7 +9,7 @@ namespace TagHierarchyManager.UI.ViewModels;
 
 public partial class SearchViewModel : ViewModelBase, IDisposable
 {
-    private readonly MainWindowViewModel mainWindow;
+    private readonly MainWindowViewModel _mainWindow;
 
     [ObservableProperty] private ObservableCollection<TagItemViewModel> _searchResults = [];
 
@@ -17,34 +17,34 @@ public partial class SearchViewModel : ViewModelBase, IDisposable
 
     public SearchViewModel(MainWindowViewModel mainWindow)
     {
-        this.mainWindow = mainWindow;
-        mainWindow.Database.TagDeleted += this.TagDatabase_OnTagDeleted;
+        this._mainWindow = mainWindow;
+        mainWindow.Database?.TagDeleted += this.TagDatabase_OnTagDeleted;
     }
 
-    public void Dispose() => this.mainWindow.Database?.TagDeleted -= this.TagDatabase_OnTagDeleted;
+    public void Dispose() => this._mainWindow.Database?.TagDeleted -= this.TagDatabase_OnTagDeleted;
 
     public void Search(string searchQuery, TagDatabaseSearchMode mode, bool searchAliases)
     {
-        if (this.mainWindow.Database == null || string.IsNullOrWhiteSpace(searchQuery)) return;
+        if (this._mainWindow.Database == null || string.IsNullOrWhiteSpace(searchQuery)) return;
 
         var results = searchAliases
-            ? this.mainWindow.Database.SearchWithAliases(searchQuery, mode)
-            : this.mainWindow.Database.Search(searchQuery, mode);
+            ? this._mainWindow.Database.SearchWithAliases(searchQuery, mode)
+            : this._mainWindow.Database.Search(searchQuery, mode);
 
         this.SearchResults.Clear();
         if (results.Count == 0)
         {
-            this.mainWindow.StatusBlockText = Resources.SearchNoResultsFound;
+            this._mainWindow.StatusBlockText = Resources.SearchNoResultsFound;
             return;
         }
 
         results.Select(tag =>
-                new TagItemViewModel(tag, id => this.mainWindow.Database.Tags.FirstOrDefault(t => t.Id == id)?.Name))
+                new TagItemViewModel(tag, id => this._mainWindow.Database.Tags.FirstOrDefault(t => t.Id == id)?.Name))
             .OrderBy(tag => tag.Name)
             .ToList()
             .ForEach(this.SearchResults.Add);
 
-        this.mainWindow.StatusBlockText = results.Count > 1
+        this._mainWindow.StatusBlockText = results.Count > 1
             ? string.Format(Resources.SearchMultipleResultsFound, results.Count)
             : Resources.SearchOneResultFound;
     }
@@ -52,7 +52,7 @@ public partial class SearchViewModel : ViewModelBase, IDisposable
     partial void OnSelectedSearchResultChanged(TagItemViewModel? value)
     {
         if (value is null) return;
-        this.mainWindow.SelectedTag = value;
+        this._mainWindow.SelectedTag = value;
     }
 
     private void TagDatabase_OnTagDeleted(object? sender, (int id, string name) deletedTag)
diff --git a/UI/ViewModels/TagItemViewModel.cs b/UI/ViewModels/TagItemViewModel.cs
index 78654dd..1a4cfa7 100644
--- a/UI/ViewModels/TagItemViewModel.cs
+++ b/UI/ViewModels/TagItemViewModel.cs
@@ -11,17 +11,17 @@ namespace TagHierarchyManager.UI.ViewModels;
 
 public partial class TagItemViewModel(Tag tag, Func<int, string?>? getNameById = null) : ViewModelBase
 {
-    [ObservableProperty] private string _editingAliases;
+    [ObservableProperty] private string _editingAliases = string.Empty;
 
     [ObservableProperty] private bool _editingIsTopLevel;
 
     [ObservableProperty] private string _editingName = tag.Name;
 
-    [ObservableProperty] private string _editingNotes;
+    [ObservableProperty] private string _editingNotes = string.Empty;
 
-    [ObservableProperty] private string _editingParents;
+    [ObservableProperty] private string _editingParents = string.Empty;
 
-    [ObservableProperty] private string _editingTagBindings;
+    [ObservableProperty] private string _editingTagBindings = string.Empty;
 
     private bool _isInitialising;
 
diff --git a/UI/Views/Common.cs b/UI/Views/Common.cs
index 747d8ed..0aa25e2 100644
--- a/UI/Views/Common.cs
+++ b/UI/Views/Common.cs
@@ -3,7 +3,7 @@ using TagHierarchyManager.UI.Assets;
 
 namespace TagHierarchyManager.UI.Views;
 
-public class Common
+public static class Common
 {
     public static FilePickerFileType MusicBeeTagHierarchy { get; } = new(Resources.FileFormatMusicBeeTagHierarchy)
     {
diff --git a/UI/Views/ImportDialog.axaml.cs b/UI/Views/ImportDialog.axaml.cs
index cd05bff..b2fb31c 100644
--- a/UI/Views/ImportDialog.axaml.cs
+++ b/UI/Views/ImportDialog.axaml.cs
@@ -11,10 +11,17 @@ public partial class ImportDialog : Window
     public ImportDialog()
     {
         this.InitializeComponent();
-        this.DataContextChanged += (s, e) =>
+
+        this.DataContextChanged += (_, _) =>
         {
             if (this.ViewModel != null) this.ViewModel.RequestClose += this.Close;
         };
+        
+        this.Unloaded += (_, _) =>
+        {
+            if (this.ViewModel != null)
+                this.ViewModel.RequestClose -= this.Close;
+        };
     }
 
     private ImportDialogViewModel? ViewModel => this.DataContext as ImportDialogViewModel;
@@ -68,6 +75,19 @@ public partial class ImportDialog : Window
     public void ButtonCancel_Click(object? sender, RoutedEventArgs e) =>
         this.Close();
 
-    public async void ButtonImport_Click(object? sender, RoutedEventArgs e) =>
-        await this.ViewModel?.InitiateImport();
+    public async void ButtonImport_Click(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            if (this.ViewModel?.DatabaseFilePath == null || this.ViewModel?.TemplateFilePath == null ||
+                this.ViewModel is null) return;
+            await this.ViewModel.InitiateImport();
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
+    }
+        
 }
\ No newline at end of file
diff --git a/UI/Views/MainWindow.axaml b/UI/Views/MainWindow.axaml
index b152251..3db912f 100644
--- a/UI/Views/MainWindow.axaml
+++ b/UI/Views/MainWindow.axaml
@@ -46,8 +46,8 @@
                         <TreeView Grid.Row="0"
                                   Name="TagTree"
                                   VerticalAlignment="Stretch"
-                                  ItemsSource="{Binding HierarchyTreeViewModel.TopLevelTags}"
-                                  SelectedItem="{Binding HierarchyTreeViewModel.SelectedTag, Mode=TwoWay}">
+                                  ItemsSource="{Binding HierarchyTreeViewModel.TopLevelTags, FallbackValue={x:Null}}"
+                                  SelectedItem="{Binding HierarchyTreeViewModel.SelectedTag, Mode=TwoWay, FallbackValue={x:Null}}">
                             <TreeView.ItemTemplate>
                                 <TreeDataTemplate ItemsSource="{Binding Children}">
                                     <StackPanel Orientation="Horizontal">
@@ -106,30 +106,30 @@
                   RowDefinitions="Auto, Auto, Auto, Auto, *, Auto"
                   Margin="5"
                   IsEnabled="{Binding SelectedTag, Converter={x:Static ObjectConverters.IsNotNull}}">
-                <TextBox Grid.Row="0" Name="NameTextbox" Text="{Binding SelectedTag.EditingName}"
+                <TextBox Grid.Row="0" Name="NameTextbox" Text="{Binding SelectedTag.EditingName, FallbackValue=''}"
                          Watermark="{x:Static assets:Resources.WatermarkTagName}" HorizontalAlignment="Stretch"
                          Margin="3" />
-                <TextBox Grid.Row="1" Name="ParentsTextBox" Text="{Binding SelectedTag.EditingParents}"
+                <TextBox Grid.Row="1" Name="ParentsTextBox" Text="{Binding SelectedTag.EditingParents, FallbackValue=''}"
                          Watermark="{x:Static assets:Resources.WatermarkTagParents}" HorizontalAlignment="Stretch"
                          Margin="3" />
-                <TextBox Grid.Row="2" Name="BindingsTextBox" Text="{Binding SelectedTag.EditingTagBindings}"
+                <TextBox Grid.Row="2" Name="BindingsTextBox" Text="{Binding SelectedTag.EditingTagBindings, FallbackValue=''}"
                          Watermark="{x:Static assets:Resources.WatermarkTagBindings}" HorizontalAlignment="Stretch"
                          Margin="3" />
-                <TextBox Grid.Row="3" Name="AliasesTextBox" Text="{Binding SelectedTag.EditingAliases}"
+                <TextBox Grid.Row="3" Name="AliasesTextBox" Text="{Binding SelectedTag.EditingAliases, FallbackValue=''}"
                          Watermark="{x:Static assets:Resources.WatermarkTagAliases}" HorizontalAlignment="Stretch"
                          Margin="3" />
-                <TextBox Grid.Row="4" Name="NotesTextBox" Text="{Binding SelectedTag.EditingNotes}"
+                <TextBox Grid.Row="4" Name="NotesTextBox" Text="{Binding SelectedTag.EditingNotes, FallbackValue=''}"
                          Watermark="{x:Static assets:Resources.WatermarkTagNotes}" VerticalAlignment="Stretch"
                          AcceptsReturn="True" TextWrapping="Wrap" MinHeight="100" Margin="3" />
                 <Grid Grid.Row="5" ColumnDefinitions="*, Auto, Auto, Auto" Margin="3">
-                    <CheckBox Grid.Column="0" IsChecked="{Binding SelectedTag.EditingIsTopLevel}"
+                    <CheckBox Grid.Column="0" IsChecked="{Binding SelectedTag.EditingIsTopLevel, FallbackValue=''}"
                               Name="TopLevelCheckBox" Content="{x:Static assets:Resources.CheckBoxTopLevel}" />
                     <Button Grid.Column="1" Margin="0 0 5 0"
                             Content="{x:Static assets:Resources.ButtonDelete}" Click="ButtonDelete_Click">
                         <Button.IsEnabled>
                             <MultiBinding Converter="{x:Static BoolConverters.And}">
-                                <Binding Path="SelectedTag.OnDatabase" />
-                                <Binding Path="!SelectedTag.HasChildren" />
+                                <Binding Path="SelectedTag.OnDatabase" FallbackValue="False"/>
+                                <Binding Path="!SelectedTag.HasChildren" FallbackValue="False"/>
                             </MultiBinding>
                         </Button.IsEnabled>
                     </Button>
diff --git a/UI/Views/MainWindow.axaml.cs b/UI/Views/MainWindow.axaml.cs
index 1ccaefa..d9b7bf7 100644
--- a/UI/Views/MainWindow.axaml.cs
+++ b/UI/Views/MainWindow.axaml.cs
@@ -1,3 +1,4 @@
+using System;
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
@@ -20,50 +21,90 @@ public partial class MainWindow : Window
 
     public void ButtonAdd_Click(object? sender, RoutedEventArgs e)
     {
-        this.ViewModel?.NewTag();
+        if (this.ViewModel?.SelectedTag is null) return;
+        this.ViewModel.NewTag();
     }
 
     public void ButtonCancel_Click(object? sender, RoutedEventArgs e)
     {
-        this.ViewModel?.SelectedTag.BeginEdit();
+        this.ViewModel?.SelectedTag?.BeginEdit();
     }
 
     public void ButtonDelete_Click(object? sender, RoutedEventArgs e)
     {
-        this.ViewModel?.StartTagDeletion();
+        try
+        {
+            if (this.ViewModel?.Database is null) return;
+            this.ViewModel?.StartTagDeletion();
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
     }
-
+    
     public async void ButtonSave_Click(object? sender, RoutedEventArgs e)
     {
-        await this.ViewModel?.SaveSelectedTagAsync();
+        try
+        {
+            if (this.ViewModel?.SelectedTag is null) return;
+            await this.ViewModel.SaveSelectedTagAsync();
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
     }
 
     public void ButtonSearch_Click(object? sender, RoutedEventArgs e)
     {
-        this.ViewModel?.StartSearch(
-            this.SearchTextBox.Text!,
-            (TagDatabaseSearchMode)this.SearchModeComboBox.SelectedIndex,
-            this.SearchAliasesCheckBox.IsChecked ?? false);
+        try
+        {
+            if (this.ViewModel?.Database is null) return;
+            this.ViewModel?.StartSearch(
+                this.SearchTextBox.Text!,
+                (TagDatabaseSearchMode)this.SearchModeComboBox.SelectedIndex,
+                this.SearchAliasesCheckBox.IsChecked ?? false);
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
+        
     }
 
     public void MenuItemDatabaseSettings_Click(object? sender, RoutedEventArgs e)
     {
-        this.ViewModel?.ShowDatabaseSettings();
+        if (this.ViewModel?.Database == null) return;
+        this.ViewModel.ShowDatabaseSettings();
     }
 
+    // Resharper disable once AsyncVoidEventHandlerMethod
     public async void MenuItemExport_Click(object? sender, RoutedEventArgs e)
     {
-        var file = await this.StorageProvider.SaveFilePickerAsync(
-            new FilePickerSaveOptions
-            {
-                Title = Assets.Resources.DialogTitleExportTagDatabase,
-                FileTypeChoices = [Common.MusicBeeTagHierarchy],
-                SuggestedFileName = this.ViewModel?.Database.Name
-            });
-        if (file == null) return;
-        var path = file.TryGetLocalPath();
-        if (path == null) return;
-        await this.ViewModel?.ExportAsync(path);
+        if (this.ViewModel?.Database == null) return;
+        try
+        {
+            var file = await this.StorageProvider.SaveFilePickerAsync(
+                new FilePickerSaveOptions
+                {
+                    Title = Assets.Resources.DialogTitleExportTagDatabase,
+                    FileTypeChoices = [Common.MusicBeeTagHierarchy],
+                    SuggestedFileName = this.ViewModel.Database.Name
+                });
+            var path = file?.TryGetLocalPath();
+            if (path == null) return;
+            await this.ViewModel.ExportAsync(path);
+        }
+        catch (Exception ex)
+        {
+            this.ViewModel.IsDbEnabled = true;
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
     }
 
     public void MenuItemImport_Click(object? sender, RoutedEventArgs e)
@@ -73,32 +114,48 @@ public partial class MainWindow : Window
 
     public async void MenuItemNew_Click(object? sender, RoutedEventArgs e)
     {
-        if (this.ViewModel is null) return;
-        var file = await this.StorageProvider.SaveFilePickerAsync(
-            new FilePickerSaveOptions
-            {
-                Title = Assets.Resources.DialogTitleSaveDatabaseAs,
-                FileTypeChoices = [Common.TagDatabaseFileType]
-            });
-        if (file == null) return;
-        var path = file.TryGetLocalPath();
-        if (path == null) return;
-        await this.ViewModel.CreateNewDatabase(path);
+        try
+        {
+            if (this.ViewModel is null) return;
+            var file = await this.StorageProvider.SaveFilePickerAsync(
+                new FilePickerSaveOptions
+                {
+                    Title = Assets.Resources.DialogTitleSaveDatabaseAs,
+                    FileTypeChoices = [Common.TagDatabaseFileType]
+                });
+            var path = file?.TryGetLocalPath();
+            if (path == null) return;
+            await this.ViewModel.CreateNewDatabase(path);
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
     }
 
     public async void MenuItemOpen_Click(object? sender, RoutedEventArgs e)
     {
-        var files = await this.StorageProvider.OpenFilePickerAsync(
-            new FilePickerOpenOptions
-            {
-                AllowMultiple = false,
-                Title = Assets.Resources.DialogTitleOpenDatabase,
-                FileTypeFilter = [Common.TagDatabaseFileType]
-            });
-        if (files.Count == 0) return;
-        var path = files[0].TryGetLocalPath();
-        if (path == null) return;
-        await this.ViewModel?.LoadDatabase(path);
+        try
+        {
+            if (this.ViewModel is null) return;
+            var files = await this.StorageProvider.OpenFilePickerAsync(
+                new FilePickerOpenOptions
+                {
+                    AllowMultiple = false,
+                    Title = Assets.Resources.DialogTitleOpenDatabase,
+                    FileTypeFilter = [Common.TagDatabaseFileType]
+                });
+            if (files.Count == 0) return;
+            var path = files[0].TryGetLocalPath();
+            if (path == null) return;
+            await this.ViewModel.LoadDatabase(path);
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
+        }
     }
 
 
@@ -121,25 +178,38 @@ public partial class MainWindow : Window
 
     public async void WindowClosing(object? sender, WindowClosingEventArgs e)
     {
-        if (this._userWantsToQuit) return;
-        if (this.ViewModel.UnsavedChanges)
+        try
         {
-            e.Cancel = true;
-            var result = await this.ViewModel.ShowNullableBoolDialog(new UnsavedChangesDialog());
-            switch (result)
+            if (this._userWantsToQuit) return;
+            if (this.ViewModel is not null && this.ViewModel.UnsavedChanges)
             {
-                case true:
-                    await this.ViewModel.SaveSelectedTagAsync();
-                    this._userWantsToQuit = true;
-                    this.Close();
-                    break;
-                case false:
-                    this._userWantsToQuit = true;
-                    this.Close();
-                    break;
-                case null:
-                    break;
+                e.Cancel = true;
+                var result = await this.ViewModel.ShowNullableBoolDialog(new UnsavedChangesDialog());
+                switch (result)
+                {
+                    case true:
+                        await this.ViewModel.SaveSelectedTagAsync();
+                        this._userWantsToQuit = true;
+                        this.Close();
+                        break;
+                    case false:
+                        this._userWantsToQuit = true;
+                        this.Close();
+                        break;
+                    case null:
+                        break;
+                }
             }
+            else
+            {
+                this._userWantsToQuit = true;
+                this.Close();
+            }
+        }
+        catch (Exception ex)
+        {
+            var error = new ErrorDialogViewModel(ex.Message);
+            error.ShowDialog();
         }
     }
 }
\ No newline at end of file