diff --git a/ApplicationView/MainApplicationWidget.cs b/ApplicationView/MainApplicationWidget.cs
index 32ff21012..f4b10355b 100644
--- a/ApplicationView/MainApplicationWidget.cs
+++ b/ApplicationView/MainApplicationWidget.cs
@@ -235,6 +235,7 @@ namespace MatterHackers.MatterControl
 		public SlicePresetsWindow EditQualityPresetsWindow{ get; set;}
         public ApplicationView MainView;
 
+        public event EventHandler ApplicationClosed;
         event EventHandler unregisterEvents;
 
         public bool WidescreenMode { get; set; }
@@ -263,6 +264,14 @@ namespace MatterHackers.MatterControl
         }
 
 
+        public void OnApplicationClosed()
+        {
+            if (ApplicationClosed != null)
+            {
+                ApplicationClosed(null, null);
+            }
+        }
+
         public static ApplicationController Instance
         {
             get
diff --git a/DataStorage/Datastore.cs b/DataStorage/Datastore.cs
index 0a729c47f..361a8a2eb 100644
--- a/DataStorage/Datastore.cs
+++ b/DataStorage/Datastore.cs
@@ -53,6 +53,19 @@ namespace MatterHackers.MatterControl.DataStorage
             }
         }
 
+        /// <summary>
+        /// Returns the application temp data folder
+        /// </summary>
+        /// <returns></returns>
+        public string ApplicationTempDataPath
+        {
+            get
+            {
+                return Path.Combine(Environment.GetFolderPath(System.Environment.SpecialFolder.LocalApplicationData), applicationDataFolderName,"data", "temp");
+            }
+        }
+
+
         public string ApplicationLibraryDataPath
         {
             get
diff --git a/MatterControl.sln b/MatterControl.sln
index 99ae1a34e..c31aa7358 100644
--- a/MatterControl.sln
+++ b/MatterControl.sln
@@ -1,6 +1,6 @@
 
-Microsoft Visual Studio Solution File, Format Version 11.00
-# Visual Studio 2010
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MatterControl", "MatterControl.csproj", "{0B8D6F56-BD7F-4426-B858-D9292B084656}"
 	ProjectSection(ProjectDependencies) = postProject
 		{F67AE800-B0C7-42A8-836F-597B4E74591C} = {F67AE800-B0C7-42A8-836F-597B4E74591C}
@@ -95,6 +95,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "agg-sharp", "agg-sharp", "{
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "InfInstaller", "PrinterDriverInstaller\InfInstaller.csproj", "{990A9AD3-B6A4-407B-9DFC-9C722AF7C9B9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mono.Nat", "..\Mono.Nat\src\Mono.Nat\Mono.Nat.csproj", "{F5D74163-145F-47BF-83DC-D0E07249C6CA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -647,12 +649,27 @@ Global
 		{990A9AD3-B6A4-407B-9DFC-9C722AF7C9B9}.Release64|x64.ActiveCfg = Release64|x64
 		{990A9AD3-B6A4-407B-9DFC-9C722AF7C9B9}.Release64|x64.Build.0 = Release64|x64
 		{990A9AD3-B6A4-407B-9DFC-9C722AF7C9B9}.Release64|x86.ActiveCfg = Release64|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug64|Any CPU.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug64|Any CPU.Build.0 = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug64|x64.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Debug64|x86.ActiveCfg = Debug|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release|x64.ActiveCfg = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release|x86.ActiveCfg = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release64|Any CPU.ActiveCfg = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release64|Any CPU.Build.0 = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release64|x64.ActiveCfg = Release|Any CPU
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA}.Release64|x86.ActiveCfg = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
-		{AE37DE1F-22F7-49EE-8732-FC6BC8DC58D9} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{670BDDFF-927B-425D-9DD1-22ACB14356EB} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{D3E41B4E-BFBB-44CA-94C8-95C00F754FDD} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{545B6912-77FF-4B34-BA76-6C3D6A32BE6A} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
@@ -668,13 +685,15 @@ Global
 		{036BCCBA-52D8-457C-84AE-8821F209FE4A} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{9B062971-A88E-4A3D-B3C9-12B78D15FA66} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{DF6845CD-64C6-4263-8357-DA8066855739} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
-		{291CD87C-2C58-4369-9D85-238C7EB31542} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
 		{A526DC5D-65F3-461B-805F-D3AC9665F5C9} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
+		{3E4AABA8-D85F-4922-88C6-5C1B2D2308FB} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
+		{AE37DE1F-22F7-49EE-8732-FC6BC8DC58D9} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
+		{291CD87C-2C58-4369-9D85-238C7EB31542} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
 		{F49EC1DD-D645-4709-8667-B57318AF67B0} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
 		{239CC6B1-537C-4998-9AA9-3372A3464498} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
 		{BEC6FD13-C765-4B90-836B-53823AC12E20} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
-		{3E4AABA8-D85F-4922-88C6-5C1B2D2308FB} = {2AB9B589-5C98-4C05-BBEA-F97DAE168EAB}
 		{6782BF37-8139-4DC6-885E-98D22D1FB258} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
+		{F5D74163-145F-47BF-83DC-D0E07249C6CA} = {DA2BE4E5-5FB2-4C74-9170-0D2513AAFC84}
 	EndGlobalSection
 	GlobalSection(MonoDevelopProperties) = preSolution
 		StartupItem = MatterControl.csproj
diff --git a/MatterControlApplication.cs b/MatterControlApplication.cs
index e7f0c8ec3..103c75b6f 100644
--- a/MatterControlApplication.cs
+++ b/MatterControlApplication.cs
@@ -57,7 +57,7 @@ namespace MatterHackers.MatterControl
         bool firstDraw = true;
         bool ShowMemoryUsed = false;
         bool DoCGCollectEveryDraw = false;
-        public bool RestartOnClose = false;
+        public bool RestartOnClose = false;        
 
         static readonly Vector2 minSize = new Vector2(600, 600);
 
@@ -373,6 +373,8 @@ namespace MatterHackers.MatterControl
             Datastore.Instance.Exit();
             PrinterConnectionAndCommunication.Instance.HaltConnectionThread();
             SlicingQueue.Instance.ShutDownSlicingThread();
+            ApplicationController.Instance.OnApplicationClosed();
+
             if (RestartOnClose)
             {
                 string appPathAndFile = System.Reflection.Assembly.GetExecutingAssembly().Location;