title: How to add downloadable products in opencart 2.0.1.1?
body: <p>I have tried to add some musics in my site which is free download products...</p>
  
  <p>In admin->catalog->downloads (Uploaded Music files)</p>
  
  <p>And in admin->catalog->products (Edit product) &amp; link-> (added download file)</p>
  
  <p>But it not shown in the Site it shows add to cart behaves like other products..</p>