The software has add-in edition as well as stand-alone solution. The user can access add-in edition via Excel context menu:
The add-in operates with selected region and has easy user interface depends on number of columns in the selected area:
If the software installer does not install the add-in automatically the user enabled to do that manually:
IMPORTANT: the software product installation folder must be added to PATH environment variable. The installer does that automatically but the user's logout/login required to apply changes.
* - in Excel 2007 and newer you can find it at Excel Options -> "View and manage Microsoft Office Add-ins" panel: