Boyum Add-on Issue - Unable to find AddOninstallerDll during install

During dialog install (error on screen) or silent install (error in C:\BoyumInstallLog.txt) I get the following error: "Unable to find AddOninstallerDll"

This error is related to not having the path of the SAP B1 Install in the windows path. 

The issue is explained in the following video that shows you how to fix it: http://youtu.be/k49AYpWX04U