Hi
Unfortunately, the countries are stored in a database table called #__eb_countries and we don't have a function to manage countries. So if you want to remove these countries, you will need to access to that database table via phpmyadmin and remove it.
If you don't know how to do that, please submit a support ticket giving us admin and FTP account of your site, let us know what countries you want to remove and we will do it for you.
Tuan
