Error Message with New Blog Template Update

I use Gravity Forms for a site contact form. I also use New Blog Templates. I just updated the New Blog Template and now I get an error message on my contact form:

Fatal error: Class 'GFUserData' not found in /home/usingess/public_html/wp-content/plugins/blogtemplates/blogtemplatesfiles/integration.php on line 259

PS. I had originally purchased the Gravity Forms specifically for Blog Signup but because it wasn't integrated with New Blog Template I wasn't able to use it for the signup form. Is this new integration with Gravity Forms supposed to work with signups using New Blog Templates?