Do you have an uninstall procedure?

I installed 3.0 beta 2... which seemed to work, but then noticed some "odd" things like manufacturer's id changing. So I uploaded the 2.03 files and re-ran the update.sql file, and now it no long works. Getting error:


Fatal error: Cannot redeclare zen_quickupdates_table_head() (previously declared in /home/royalind/public_html/store/admin/quick_updates.php:32) in /home/royalind/public_html/store/admin/includes/functions/extra_functions/quick_updates.php on line 14

any ideas?