GP premium them updates

Error Reinstalling WP

While upgrading like many had the same internal error. Removed wordpress directory Deleted GP Premium Theme When I go back to reinstall GP Premium Theme I get this error message (any ideas what to do next?)- Fatal error: Call to undefined function generate_main_class() in /home/content/p3pnexwpnas07_data03/05/2710705/html/wp-content/plugins/gp-premium/addons/generate-sections/inc/templates/generate-sections-page-template.php on line 18