Fatal error after update

After I updated this from a fairly older version, I’m getting this error:

Fatal error: Uncaught Error: Call to undefined method FrmProAppHelper::get_updater() in D:\home\site\wwwroot\wp-content\plugins\formidable\pro\classes\controllers\FrmProHooksController.php:9 Stack trace: #0 D:\home\site\wwwroot\wp-content\plugins\formidable\pro\formidable-pro.php(21): FrmProHooksController::load_pro() #1 D:\home\site\wwwroot\wp-includes\class-wp-hook.php(286): load_formidable_pro('') #2 D:\home\site\wwwroot\wp-includes\class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #3 D:\home\site\wwwroot\wp-includes\plugin.php(453): WP_Hook->do_action(Array) #4 D:\home\site\wwwroot\wp-settings.php(344): do_action('plugins_loaded') #5 D:\home\site\wwwroot\wp-config.php(124): require_once('D:\\home\\site\\ww...') #6 D:\home\site\wwwroot\wp-load.php(37): require_once('D:\\home\\site\\ww...') #7 D:\home\site\wwwroot\wp-blog-header.php(13): require_once('D:\\home\\site\\ww...') #8 D:\home\site\wwwroot\index.php(17): require('D:\\home\\site\\ww...') #9 {main} thrown in D:\home\site\wwwroot\wp-content\plugins\formidable\pro\classes\controllers\FrmProHooksController.php on line 9

This is on a Windows IIS machine on Azure. It was working perfectly before. I’m going to roll it back, but was wondering if there was any insight into this?