diff --git a/Source/LibationAvalonia/MessageBox.cs b/Source/LibationAvalonia/MessageBox.cs
index b5468893..880c3269 100644
--- a/Source/LibationAvalonia/MessageBox.cs
+++ b/Source/LibationAvalonia/MessageBox.cs
@@ -177,9 +177,12 @@ Libation.
 			tbx.MinWidth = vm.TextBlockMinWidth;
 			tbx.Text = message;
 
-			var thisScreen = owner.Screens.ScreenFromVisual(owner);
+			
+			var thisScreen = owner.Screens?.ScreenFromVisual(owner);
 
-			var maxSize = new Size(0.20 * thisScreen.Bounds.Width, 0.9 * thisScreen.Bounds.Height - 55);
+			var maxSize
+				= thisScreen is null ? owner.ClientSize
+				: new Size(0.20 * thisScreen.Bounds.Width, 0.9 * thisScreen.Bounds.Height - 55);
 
 			var desiredMax = new Size(maxSize.Width, maxSize.Height);
 
diff --git a/Source/LibationAvalonia/Views/MainWindow.axaml.cs b/Source/LibationAvalonia/Views/MainWindow.axaml.cs
index c708258c..a33d95df 100644
--- a/Source/LibationAvalonia/Views/MainWindow.axaml.cs
+++ b/Source/LibationAvalonia/Views/MainWindow.axaml.cs
@@ -21,7 +21,7 @@ namespace LibationAvalonia.Views
 			InitializeComponent();
 			Configure_Upgrade();
 
-			Loaded += MainWindow_Loaded;
+			Opened += MainWindow_Opened;
 			Closing += MainWindow_Closing;
 			LibraryLoaded += MainWindow_LibraryLoaded;
 
@@ -35,7 +35,7 @@ namespace LibationAvalonia.Views
 			}
 		}
 
-		private async void MainWindow_Loaded(object sender, EventArgs e)
+		private async void MainWindow_Opened(object sender, EventArgs e)
 		{
 			if (Configuration.Instance.FirstLaunch)
 			{