@Laura Pio: Yes, we are doing fine. Thanks for supporting us.
1. You default background should be from “Appearance => Background”, and change as per your need. I see currently you have this image as default background http://laurapiofotografia.com.br/wp-content/uploads/flormetal2leveee.jpg. Next, you should add like in free version. That’s fine. Free and Pro version are same.
But looks like you have added color or content and all. So, it’s not transparent to show that. Can you let me know what are the css that you have in “Appearance => Customize => Theme Options => Custom CSS” box.
Also let me know, where you want these background image to show. For example, if you want to show in your content area then, your content content area background needs to be transparent
#content {
background-color: transparent;
}