doitinpoland.com/wp-content/plugins/mailchimp-for-wp/config/default-form-settings.php

<?php
return array(
	'css'                => 0,
	'double_optin'       => 1,
	'hide_after_success' => 0,
	'lists'              => array(),
	'redirect'           => '',
	'replace_interests'  => 1,
	'required_fields'    => '',
	'update_existing'    => 0,
	'subscriber_tags'    => '',
);