This template has the menu in left sidebar. The menu is using the Simple Navigation menu template. It is styled in the stylesheet called Navigation: Simple - Vertical.
You can easily float the sidebar with the menu to the right instead. Look in the Layout: Left sidebar + 1 column stylesheet for the float: left; property in the div#sidebar element. Change that to float: right; and the sidebar with the menu will instead be on the right side of the content.
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