pro causes fatal error

upon purchasing pro i get this error:

Fatal error: Uncaught Error: Call to undefined method SPWPS::createOptions() in /home/customer/www/littlecrumbsbakery.co.uk/public_html/wp-content/plugins/woo-product-slider-pro/admin/views/settings.config.php:23 Stack trace: #0 /home/customer/www/littlecrumbsbakery.co.uk/public_html/wp-content/plugins/woo-product-slider-pro/woo-product-slider-pro.php(24): require_once() #1 /home/customer/www/littlecrumbsbakery.co.uk/public_html/wp-admin/includes/plugin.php(2286): include_once(‘/home/customer/…’) #2 /home/customer/www/littlecrumbsbakery.co.uk/public_html/wp-admin/plugins.php(191): plugin_sandbox_scrape(‘woo-product-sli…’) #3 {main} thrown in /home/customer/www/littlecrumbsbakery.co.uk/public_html/wp-content/plugins/woo-product-slider-pro/admin/views/settings.config.php on line 23

any assistance would be greatly appreciated!