[Plugin: Pagerank tools] Missing files

The archive is missing a whole set of directories and files.

The main pagerank-tools.php file has the following includes:

include('lib/wp_url.inc.php');
include('res/pagerank.php');
include('functions.inc.php');
include('admin/dashboard.php');
include('admin/pageranks.php');
include('admin/pageranks_listing.inc.php');
include('admin/settings.inc.php');

but only the functions.inc.php file is included in the download.

https://www.ads-software.com/extend/plugins/pagerank-tools/