Looking at the page you linked (http://localizadorimobiliario.com/property/bcp-green-valley-commercial/), it looks like your theme is not outputting the header in the normal WordPress way. I'm not sure there is much you can do about that - with IProperty, we're assuming a theme follows WordPress standards. If they're doing something strange, it may require special support.
If you could paste the code from your theme's index.php file, I could try to figure out what is going on.
As for widgets - there are widgets included in the paid version of the plugin.
Thanks!