Add instructions to update Cloud Explorer

This is to ensure users pick up the latest Cloud Explorer changes that are available publicly but not inserted in the base VS build.

Author: William Xie

docs/debugger/debug-live-azure-applications.md

@@ -46,16 +46,18 @@ Additionally, the Snapshot Debugger is only available for **Visual Studio Enterp
 
 ## Start the Snapshot Debugger
 
-1. Install the [Visual Studio Enterprise 15.4 Preview](https://www.visualstudio.com/en-us/news/releasenotes/vs2017-preview-relnotes) or later.
+1. Install the [Visual Studio Enterprise 15.4 Preview](https://www.visualstudio.com/en-us/news/releasenotes/vs2017-preview-relnotes) or later. Ensure that your installation contains the Azure development workload.
 
-2. Install the [Snapshot Debugger extension](http://aka.ms/snapshotdebuggervsix) for Visual Studio. This extension will enable you to set snappoints and logpoints against apps running in Azure App Services.
+2. Update to the latest Cloud Explorer from the **Tools > Extensions and Updates...** menu.
 
-3. Open the project you would like to snapshot debug. 
+3. Install the [Snapshot Debugger extension](http://aka.ms/snapshotdebuggervsix) for Visual Studio. This extension will enable you to set snappoints and logpoints against apps running in Azure App Services.
+
+4. Open the project you would like to snapshot debug. 
 
     > [!NOTE] 
     > In order to snapshot debug, you need to open the **same version of source code** that is published to your Azure Azure App Service. 
 
-4. In the Cloud Explorer, right click the Azure App Service your project is deployed to and select **Attach Snapshot Debugger** to start the Snapshot Debugger.
+5. In the Cloud Explorer, right click the Azure App Service your project is deployed to and select **Attach Snapshot Debugger** to start the Snapshot Debugger.
 
     ![Launch the snapshot debugger](../debugger/media/snapshot-launch.png "Launch the snapshot debugger")