diff --git a/DesignTools/Attributes/HideUpdateButtonAttribute.cs b/DesignTools/Attributes/ShowUpdateButtonAttribute.cs
similarity index 94%
rename from DesignTools/Attributes/HideUpdateButtonAttribute.cs
rename to DesignTools/Attributes/ShowUpdateButtonAttribute.cs
index 9e6e98edf..5455a0e5b 100644
--- a/DesignTools/Attributes/HideUpdateButtonAttribute.cs
+++ b/DesignTools/Attributes/ShowUpdateButtonAttribute.cs
@@ -32,9 +32,9 @@ using System;
 namespace MatterHackers.MatterControl.DesignTools
 {
 	[AttributeUsage(AttributeTargets.Class)]
-	public class HideUpdateButtonAttribute : Attribute
+	public class ShowUpdateButtonAttribute : Attribute
 	{
-		public HideUpdateButtonAttribute()
+		public ShowUpdateButtonAttribute()
 		{
 		}
 	}
diff --git a/DesignTools/Operations/Align3D.cs b/DesignTools/Operations/Align3D.cs
index d4e524e4b..6953fec46 100644
--- a/DesignTools/Operations/Align3D.cs
+++ b/DesignTools/Operations/Align3D.cs
@@ -177,7 +177,6 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 		}
 	}
 
-	[HideUpdateButtonAttribute]
 	public class Align3D : Object3D, IPublicPropertyObject, IPropertyGridModifier
 	{
 		// We need to serialize this so we can remove the arrange and get back to the objects before arranging
diff --git a/DesignTools/Operations/FitToBounds3D.cs b/DesignTools/Operations/FitToBounds3D.cs
index 4b0f1bf6c..5a0045a88 100644
--- a/DesignTools/Operations/FitToBounds3D.cs
+++ b/DesignTools/Operations/FitToBounds3D.cs
@@ -45,7 +45,6 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 
 	public enum MaintainRatio { None, X_Y, X_Y_Z }
 
-	[HideUpdateButtonAttribute]
 	public class FitToBounds3D : Object3D, IPublicPropertyObject, IEditorDraw, IPropertyGridModifier
 	{
 		[Description("Set the shape the part will be fit into.")]
diff --git a/DesignTools/Primitives/ConeObject3D.cs b/DesignTools/Primitives/ConeObject3D.cs
index cf62b474c..481ea2d2c 100644
--- a/DesignTools/Primitives/ConeObject3D.cs
+++ b/DesignTools/Primitives/ConeObject3D.cs
@@ -39,7 +39,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class ConeObject3D : Object3D, IPublicPropertyObject
 	{
 		public ConeObject3D()
diff --git a/DesignTools/Primitives/CubeObject3D.cs b/DesignTools/Primitives/CubeObject3D.cs
index 0dd9cc666..87b99b2b0 100644
--- a/DesignTools/Primitives/CubeObject3D.cs
+++ b/DesignTools/Primitives/CubeObject3D.cs
@@ -35,7 +35,6 @@ using MatterHackers.PolygonMesh;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class CubeObject3D : Object3D, IPublicPropertyObject
 	{
 		public CubeObject3D()
diff --git a/DesignTools/Primitives/CylinderObject3D.cs b/DesignTools/Primitives/CylinderObject3D.cs
index cd7d05c10..fd0581656 100644
--- a/DesignTools/Primitives/CylinderObject3D.cs
+++ b/DesignTools/Primitives/CylinderObject3D.cs
@@ -39,7 +39,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class CylinderObject3D : Object3D, IPublicPropertyObject, IPropertyGridModifier
 	{
 		public CylinderObject3D()
diff --git a/DesignTools/Primitives/HalfCylinderObject3D.cs b/DesignTools/Primitives/HalfCylinderObject3D.cs
index 7e675e5bf..ea6b86761 100644
--- a/DesignTools/Primitives/HalfCylinderObject3D.cs
+++ b/DesignTools/Primitives/HalfCylinderObject3D.cs
@@ -38,7 +38,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class HalfCylinderObject3D : Object3D, IPublicPropertyObject
 	{
 		public HalfCylinderObject3D()
diff --git a/DesignTools/Primitives/HalfSphereObject3D.cs b/DesignTools/Primitives/HalfSphereObject3D.cs
index 2c8011110..1a46a4e57 100644
--- a/DesignTools/Primitives/HalfSphereObject3D.cs
+++ b/DesignTools/Primitives/HalfSphereObject3D.cs
@@ -38,7 +38,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class HalfSphereObject3D : Object3D, IPublicPropertyObject
 	{
 		public HalfSphereObject3D()
diff --git a/DesignTools/Primitives/HalfWedgeObject3D.cs b/DesignTools/Primitives/HalfWedgeObject3D.cs
index 54627b524..f1999f113 100644
--- a/DesignTools/Primitives/HalfWedgeObject3D.cs
+++ b/DesignTools/Primitives/HalfWedgeObject3D.cs
@@ -38,7 +38,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class HalfWedgeObject3D : Object3D, IPublicPropertyObject
 	{
 		public HalfWedgeObject3D()
diff --git a/DesignTools/Primitives/PyramidObject3D.cs b/DesignTools/Primitives/PyramidObject3D.cs
index 5cde11dcb..6548c8a7a 100644
--- a/DesignTools/Primitives/PyramidObject3D.cs
+++ b/DesignTools/Primitives/PyramidObject3D.cs
@@ -37,7 +37,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class PyramidObject3D : Object3D, IPublicPropertyObject
 	{
 		public PyramidObject3D()
diff --git a/DesignTools/Primitives/RingObject3D.cs b/DesignTools/Primitives/RingObject3D.cs
index fb4710898..e4d31b59a 100644
--- a/DesignTools/Primitives/RingObject3D.cs
+++ b/DesignTools/Primitives/RingObject3D.cs
@@ -40,7 +40,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class RingObject3D : Object3D, IPublicPropertyObject, IPropertyGridModifier
 	{
 		public RingObject3D()
diff --git a/DesignTools/Primitives/SphereObject3D.cs b/DesignTools/Primitives/SphereObject3D.cs
index 9428a8ceb..2ff8a6bb7 100644
--- a/DesignTools/Primitives/SphereObject3D.cs
+++ b/DesignTools/Primitives/SphereObject3D.cs
@@ -38,7 +38,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class SphereObject3D : Object3D, IPublicPropertyObject, IPropertyGridModifier
 	{
 		public SphereObject3D()
diff --git a/DesignTools/Primitives/TorusObject3D.cs b/DesignTools/Primitives/TorusObject3D.cs
index b9e7e5de8..db38bafeb 100644
--- a/DesignTools/Primitives/TorusObject3D.cs
+++ b/DesignTools/Primitives/TorusObject3D.cs
@@ -36,7 +36,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class TorusObject3D : Object3D, IPublicPropertyObject, IPropertyGridModifier
 	{
 		public TorusObject3D()
diff --git a/DesignTools/Primitives/WedgeObject3D.cs b/DesignTools/Primitives/WedgeObject3D.cs
index 0e2b7b1ce..12a8a72b6 100644
--- a/DesignTools/Primitives/WedgeObject3D.cs
+++ b/DesignTools/Primitives/WedgeObject3D.cs
@@ -39,7 +39,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	[HideUpdateButtonAttribute]
 	public class WedgeObject3D : Object3D, IPublicPropertyObject
 	{
 		public WedgeObject3D()
diff --git a/DesignTools/PublicPropertyEditor.cs b/DesignTools/PublicPropertyEditor.cs
index 953a5eb77..714d0a0f7 100644
--- a/DesignTools/PublicPropertyEditor.cs
+++ b/DesignTools/PublicPropertyEditor.cs
@@ -146,8 +146,8 @@ namespace MatterHackers.MatterControl.DesignTools
 				}
 
 				// add in an Update button if applicable
-				var hideUpdate = context.item.GetType().GetCustomAttributes(typeof(HideUpdateButtonAttribute), true).FirstOrDefault() as HideUpdateButtonAttribute;
-				if (hideUpdate == null)
+				var showUpdate = context.item.GetType().GetCustomAttributes(typeof(ShowUpdateButtonAttribute), true).FirstOrDefault() as ShowUpdateButtonAttribute;
+				if (showUpdate != null)
 				{
 					var updateButton = theme.ButtonFactory.Generate("Update".Localize());
 					updateButton.Margin = new BorderDouble(5);
diff --git a/MatterControl.csproj b/MatterControl.csproj
index efe403504..749b92544 100644
--- a/MatterControl.csproj
+++ b/MatterControl.csproj
@@ -88,6 +88,7 @@
     <Compile Include="CustomWidgets\TreeView\TreeNode.cs" />
     <Compile Include="CustomWidgets\TreeView\TreeView.cs" />
     <Compile Include="DesignTools\Attributes\ShowSearchFieldAttribute.cs" />
+    <Compile Include="DesignTools\Attributes\ShowUpdateButtonAttribute.cs" />
     <Compile Include="DesignTools\Interfaces\IPublicPropertyObject.cs" />
     <Compile Include="DesignTools\EditableTypes\DirectionAxis.cs" />
     <Compile Include="DesignTools\EditableTypes\DirectionVector.cs" />
@@ -141,7 +142,6 @@
     <Compile Include="ApplicationView\OemProfileDictionary.cs" />
     <Compile Include="ApplicationView\WindowsPlatformsFeatures.cs" />
     <Compile Include="DataStorage\ApplicationDataStorage.cs" />
-    <Compile Include="DesignTools\Attributes\HideUpdateButtonAttribute.cs" />
     <Compile Include="DesignTools\Attributes\IconsAttribute.cs" />
     <Compile Include="DesignTools\Attributes\WebPageLinkAttribute.cs" />
     <Compile Include="DesignTools\Interfaces\IEditorDraw.cs" />
diff --git a/PartPreviewWindow/SelectedObjectPanel.cs b/PartPreviewWindow/SelectedObjectPanel.cs
index aaf132ac6..48cdbfc66 100644
--- a/PartPreviewWindow/SelectedObjectPanel.cs
+++ b/PartPreviewWindow/SelectedObjectPanel.cs
@@ -42,7 +42,6 @@ using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow
 {
-	[HideUpdateButtonAttribute]
 	public class SelectedObjectPanel : FlowLayoutWidget, IContentStore
 	{
 		private IObject3D item = new Object3D();
diff --git a/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs b/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
index c63dbddc3..0cb446e80 100644
--- a/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
+++ b/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
@@ -42,6 +42,7 @@ using MatterHackers.PolygonMesh;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow.View3D
 {
+	[ShowUpdateButtonAttribute]
 	public class SubtractAndReplaceObject3D : MeshWrapperObject3D, IPublicPropertyObject
 	{
 		public SubtractAndReplaceObject3D()
diff --git a/PartPreviewWindow/View3D/Actions/SubtractObject3D.cs b/PartPreviewWindow/View3D/Actions/SubtractObject3D.cs
index eb90375b7..3243c9e64 100644
--- a/PartPreviewWindow/View3D/Actions/SubtractObject3D.cs
+++ b/PartPreviewWindow/View3D/Actions/SubtractObject3D.cs
@@ -42,6 +42,7 @@ using System.Threading.Tasks;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow.View3D
 {
+	[ShowUpdateButtonAttribute]
 	public class SubtractObject3D : MeshWrapperObject3D, IPublicPropertyObject
 	{
 		public SubtractObject3D()
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index ff2b0c012..4a69f0ae9 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit ff2b0c012a0f2e3cec4c27e8c7a4e1bbe004e36f
+Subproject commit 4a69f0ae9b14876c8c4226d8d0d94a3d1283edbf