database error right after installing Blog Activity - Unknown column 'last_active'

I get the following error:

[30-Apr-2014 22:37:27] WordPress database error Unknown column 'last_active' in 'where clause' for query DELETE FROM uhooh03ma_comment_activity WHERE last_active < '1396219047' made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('settings_page_blog_activity_main'), call_user_func_array, Blog_Activity->page_main_output, Blog_Activity->schedule_cron, Blog_Activity->cleanup