This theme is not part of the Pro Plus package - it's a Community Marketplace theme, on a separate sales page, bought directly from the designer and supported by them.
You can add an ecommerce plugin to any theme.
These forums were CLOSED to new posts on November 19th, 2012. New forums are here: http://www.studiopress.com/forums/
and you will need to SIGN UP AGAIN.
If you need assitance with setting up your theme, go to http://my.studiopress.com/
and read the SETUP links or the TUTORIALS link on the side tab.
If you need Account Assistance
, file a help desk ticket at the same location.