Not showing stars

Hi, I have installed the free version and I′d like to purchase the premium one because I think that you must earn money for this grreat job but I′d like to know if can show the rating stars because at this moment it only shows the rating as text: “Rating 5 of 5” but no stars.

I′ll wait for your answer. Thanks

The page I need help with: [log in to see the link]