cleaned up app startup logic.

fixed update app issue.

NzbDrone/MessageBoxUserAlert.cs

@@ -0,0 +1,13 @@
+using System.Windows.Forms;
+using NzbDrone.Host;
+
+namespace NzbDrone
+{
+    public class MessageBoxUserAlert : IUserAlert
+    {
+        public void Alert(string message)
+        {
+            MessageBox.Show(text: message, buttons: MessageBoxButtons.OK, icon: MessageBoxIcon.Warning, caption: "NzbDrone");
+        }
+    }
+}

NzbDrone/NzbDrone.csproj

@@ -96,6 +96,7 @@
     <Compile Include="..\NzbDrone.Common\Properties\SharedAssemblyInfo.cs">
       <Link>Properties\SharedAssemblyInfo.cs</Link>
     </Compile>
+    <Compile Include="MessageBoxUserAlert.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>

NzbDrone/WindowsApp.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Windows.Forms;
 using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Host;
 using NzbDrone.SysTray;
 
 namespace NzbDrone
@@ -11,10 +12,13 @@ namespace NzbDrone
         {
             try
             {
-                var container = Host.Bootstrap.Start(new StartupArguments(args));
+                var container = Bootstrap.Start(new StartupArguments(args), new MessageBoxUserAlert());
                 container.Register<ISystemTrayApp, SystemTrayApp>();
                 container.Resolve<ISystemTrayApp>().Start();
             }
+            catch (TerminateApplicationException)
+            {
+            }
             catch (Exception e)
             {
                 var message = string.Format("{0}: {1}", e.GetType().Name, e.Message);