Select 'New SQL Server stand-alone installation or add features to an existing installation'.
Wait for the next screen to launch.
Select [License Terms], check the box next to 'I accept the license terms.' and click [Next].
Select 'Add features to an exisiting instance of SQL Server 2012' and use SENT4EXPRESS as the instance. Click [Next].
In the 'Feature Selection' window, under 'Instance Features', select 'Full-Text and Semantic Extractions for Search'. Click [Next].
Accept the default settings for Server Configuration. Click [Next].
In the 'Error Reporting' window, select if you would like to send errors to Microsoft. Click [Next].
When the installation has been successfully completed, click the [Close] button.
The following message may appear when the installation is complete. If you receive this message restart your computer before using Sentinel Visualizer. Otherwise, you
can begin using Sentinel Visualizer.