Hi there, When you actívate the plugin and are logged as an admin, the options of the plugin appear at: SETTINGS / WP Super Cache.
Unfortunately we are not the codders of the WP Super Cache plugin and have only codded an addon.
If you need more help with this topic and not seeing the WP Super Cache settings, I would recommend posting it to the support forum of the plugin, where more people will be able to help you: http://wordpress.org/support/plugin/wp-super-cache