diff --git a/SpineViewer/src/MainForm.Designer.cs b/SpineViewer/src/MainForm.Designer.cs
index fe6deff..4b7474f 100644
--- a/SpineViewer/src/MainForm.Designer.cs
+++ b/SpineViewer/src/MainForm.Designer.cs
@@ -419,8 +419,6 @@
         private ToolStripMenuItem toolStripMenuItem_About;
         private ToolStripMenuItem toolStripMenuItem_BatchOpen;
         private GroupBox groupBox_Preview;
-        private OpenFileDialog openFileDialog_Skel;
-        private OpenFileDialog openFileDialog_Atlas;
         private ToolTip toolTip;
         private PropertyGrid propertyGrid_Skel;
         private SpineListView spineListView;
diff --git a/SpineViewer/src/SpinePreviewer.cs b/SpineViewer/src/SpinePreviewer.cs
index 14eda3c..512feb4 100644
--- a/SpineViewer/src/SpinePreviewer.cs
+++ b/SpineViewer/src/SpinePreviewer.cs
@@ -21,10 +21,10 @@ namespace SpineViewer
             private readonly SFML.Graphics.RenderWindow RenderWindow;
             private readonly Control ContainerControl;
 
-            public PreviewerProperty(SFML.Graphics.RenderWindow renderWindow, Control containerControl)
+            public PreviewerProperty(SpinePreviewer previewer)
             {
-                RenderWindow = renderWindow;
-                ContainerControl = containerControl;
+                RenderWindow = previewer.RenderWindow;
+                ContainerControl = previewer;
             }
 
             /// <summary>
@@ -189,7 +189,7 @@ namespace SpineViewer
             RenderWindow = new(panel.Handle);
             RenderWindow.SetFramerateLimit(30);
             RenderWindow.SetActive(false);
-            Property = new(RenderWindow, this)
+            Property = new(this)
             {
                 Resolution = new(1280, 720),
                 Center = new(0, 0),