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Error Installing the Workfront Outlook Add-in

Problem

Installing the Workfront Outlook Add-in and receive the Error:
"Installing Office customization. There was an error during installation.
Exception reading manifest from file:///C:/Users/username/AppData/Local/Programs/AtTask/Workfront OutlookAdd-in(32 bit)/AtTask.OutlookAddIn.vsto: the manifest may not be valid or the file could not be opened."

Solution

This error is caused by Microsoft Visual Studio being out of date.
Download and install the update for MS VS2010 found here:
http://www.microsoft.com/en-us/download/details.aspx?id=48217