OK...I have searched and searched the threads and haven't been able to solve my problem. Hopefully someone can help me. Anytime I try to send out a newsletter or mail a gift certificate I get this:

1054 Unknown column 'COWOA_account' in 'where clause'
in:
[select customers_email_address, customers_firstname, customers_lastname from zen_customers where COWOA_account != 1 order by customers_lastname, customers_firstname, customers_email_address ]

Obviously it's an issue with the COWOA add-on. I ran the SQL patch to install it. After having these issues I tried to run the uninstall SQL. It always comes back with an error. I tried every line seperately and they all come back with an error. At this point I have no interest in even keeping this module. I just want my site to work. On top of all of it, I didn't realize I was having this issue and added products to my store and customers have made purchases and so on. If I go back and restore my database to pre-COWOA what am I going to lose? Any help would be appreciated.