VHOST Domain Mapping upgrade issue

After trying to update from 3.0.4 to 3.0.5 I'm getting the following error when I try activate.

Fatal error: Cannot redeclare set_domainmap_dir() (previously declared in /mnt/stor7-wc2-dfw1/537071/www.swordgroup.com/web/content/wp-content/mu-plugins/domain-mapping.php:693) in /mnt/stor7-wc2-dfw1/537071/www.swordgroup.com/web/content/wp-content/plugins/domain-mapping/domain-mapping.php on line 706

I'm running on cloud site and the way I updated was by deactivated and deleting the old domain mapping plug in and files and replacing them with the new plugin files. Unfortunately though, when I go to activate, I get that error.