Did the author actually take the time to test this piece of coded crap?
Quite frankly, and without reservation, this plug-in is not recommended and should have been banned by WordPress long ago (if only for the lousy coding…)
Not only does it break, in at least two (and probably more, because of the nested crap this guy puts out, I don’t have time to follow the trail…) line item locations on both generic (aka the Default theme) and customized themes. Absolute, total code cruft, and minimal attention to detail. Can’t hit the delete button too fast.