Topic: Images / Pictures in Reverse Order

Maybe someone can help me.  I've created a photo gallery with SimpleViewer Pro.  Now I want the picture thumbnails to display in reverse order starting with the last image I uploaded to the first. 

I've modified the following code in the buildgallery.php file, however this didn't seem to have any effect.

// Set $bgOptions['sortInReverseOrder'] to false to sort images in forward order.
$bgOptions['sortInReverseOrder'] = true;

Is there some other file I have to edit to make the reverse order a global change?