diff --git a/Signals And Transforms/App.xaml b/Signals And Transforms/App.xaml
index a667342..9a0ed84 100644
--- a/Signals And Transforms/App.xaml	
+++ b/Signals And Transforms/App.xaml	
@@ -2,7 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:SignalsAndTransforms"
-             StartupUri="MainWindow.xaml">
+             Startup="Application_Startup">
     <Application.Resources>
         <SolidColorBrush x:Key="WindowBackground" Color="#FFEEEEFF"/>
         <Style x:Key="LabelText" TargetType="TextBlock">
diff --git a/Signals And Transforms/App.xaml.cs b/Signals And Transforms/App.xaml.cs
index 4762c18..c4e6fc5 100644
--- a/Signals And Transforms/App.xaml.cs	
+++ b/Signals And Transforms/App.xaml.cs	
@@ -1,4 +1,5 @@
-using System;
+using SignalsAndTransforms.Managers;
+using System;
 using System.Collections.Generic;
 using System.Configuration;
 using System.Data;
@@ -13,5 +14,14 @@ namespace SignalsAndTransforms
     /// </summary>
     public partial class App : Application
     {
+        private void Application_Startup(object sender, StartupEventArgs e)
+        {
+            MainWindow window = new MainWindow();
+            if (e.Args.Length == 1)
+            {
+                WorkBookManager.Manager().Load(e.Args[0], true);
+            }
+            window.Show();
+        }
     }
 }
diff --git a/Signals And Transforms/Installer/Product.wxs b/Signals And Transforms/Installer/Product.wxs
index dd177d1..eca230d 100644
--- a/Signals And Transforms/Installer/Product.wxs	
+++ b/Signals And Transforms/Installer/Product.wxs	
@@ -8,8 +8,8 @@
 
 		<Feature Id="ProductFeature" Title="Product" Level="1">
 			<ComponentGroupRef Id="ProductComponents" />
+      <ComponentRef Id="FileExtensions"/>
 		</Feature>
-    
 	</Product>
 
 	<Fragment>
@@ -17,10 +17,20 @@
 			<Directory Id="ProgramFilesFolder">
         <Directory Id="INSTALLFOLDER" Name="Signals And Transforms">
           <Directory Id="INSTALLLOCATION" Name=".">
-            <Directory Id="ProductComponents"></Directory>
+            <Directory Id="ProductComponents"/>
           </Directory>
         </Directory>
 			</Directory>
 		</Directory>
 	</Fragment>
+
+  <Fragment>
+    <Component Id="FileExtensions" Directory="TARGETDIR" Guid="{39568E18-4098-44F3-9845-A52DF783A979}">
+      <ProgId Id="SignalsAndTransforms.stw" Description="Workbook">
+        <Extension Id="stw" ContentType="application/stw">
+          <Verb Id="open" Command="Open" TargetFile="fil41798E866BC736CEC72FD22DC3251767" Argument="&quot;%1&quot;" />
+        </Extension>
+      </ProgId>
+    </Component>
+  </Fragment>
 </Wix>
diff --git a/Signals And Transforms/MainWindow.xaml b/Signals And Transforms/MainWindow.xaml
index 9e1a957..6956d0a 100644
--- a/Signals And Transforms/MainWindow.xaml	
+++ b/Signals And Transforms/MainWindow.xaml	
@@ -9,7 +9,8 @@
         xmlns:res="clr-namespace:SignalsAndTransforms.Properties"
         xmlns:ribbon="clr-namespace:System.Windows.Controls.Ribbon;assembly=System.Windows.Controls.Ribbon"
         mc:Ignorable="d"
-        Title="Signals And Transforms" Height="768" Width="1380">
+        Title="Signals And Transforms" Height="768" Width="1380"
+        Loaded="Window_Loaded">
     <Grid x:Name="LayoutRoot" AllowDrop="True" Drop="LayoutRoot_Drop">
         <Grid.RowDefinitions>
             <RowDefinition Height="Auto"/>
diff --git a/Signals And Transforms/MainWindow.xaml.cs b/Signals And Transforms/MainWindow.xaml.cs
index 99d546b..c84fd38 100644
--- a/Signals And Transforms/MainWindow.xaml.cs	
+++ b/Signals And Transforms/MainWindow.xaml.cs	
@@ -150,5 +150,10 @@ private void SetActiveWorkbook(string file)
             WorkBookManager.Manager().Load(file, true);
             SetActiveWorkbookTitle();
         }
+
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            SetActiveWorkbookTitle();
+        }
     }
 }