Hi,
As many features work with the cookie data like download count, authorization for any package download. But there also an option that store IP address and user data.
You have to comment out the following line from libs/class.DownloadStats.php
line 17.
$wpdb->insert("{$wpdb->prefix}ahm_download_stats",array('pid'►(int)$pid, 'uid'►(int)$uid,'oid'►$oid, 'year'► date("Y"), 'month'► date("m"), 'day'► date("d"), 'timestamp'► time(),'ip'►"$ip"));
It will stop saving data of users.
Thanks