I have updated to the latest version of WP (4.1.1) and the latest version of QuForm (1.5.1) and when I activate the plugin I get nothing but a white screen on my site.
Thanks for getting back to me. There was one fatal error in the error log:
Fatal error: Class ‘EEH_Template’ not found in /home/admin/domains/opendialogueapproach.co.uk/public_html/wp-content/plugins/eea-people-addon/public/template_hooks.php on line 66
So I disabled this plugin and QuForm started working again. So it would appear that the conflict is between QuForm and Event Espresso 4 People Add on Plugin. How do I go about sorting this?