edit   include/sites.php

Locate near line #49

         order by
             hits_in desc

Change to

         order by
             added desc

You can sort by any column name. You can even sort by 2 columns. Valid column names are  ..

site_name, site_url, added, last_update, site_description , country, hits_in, hits_out, total_reviews

Some example ...

Sorted alphabetically ...

         order by
             site_name asc

Sorted most recently updated, which is just liked added, but allows you to "bump" sites up by editing their entries in the admin panel.

         order by
             last_update desc

Sorted by most hits in, then most hits out..

         order by
             hits_in desc, hits_out desc

Sorted by site with most reviews, then by oldest first

         order by
             total_reviews desc, added asc