Here is the request from the client and my resonse, Write catchy follow up with call to action

Hi
I'd like to test with cookbook, but all example fails because is missing viewflow.contrib I believe this is part of pro version.
impossibile to find any doc on how to require pro version or whatever
any hep?
tnk

Hi NAME_1, 
Thank you for your interest in Viewflow and for bringing this issue to our attention. I understand that you are encountering issues with the cookbook examples due to missing viewflow.contrib, which is only available in the PRO version. I apologize for any confusion. The cookbook samples on the Viewflow website are indeed designed specifically for the Viewflow PRO version, which offers additional functionality and features beyond the open-source version. 
You could find cookbook samples running online at https://demo.viewflow.io/ To use the cookbook samples locally that require the viewflow.contrib package, you will need to upgrade to the Viewflow PRO version, which can be purchased at https://viewflow.io/pro.html. Once you have the PRO version installed, you should be able to use the cookbook examples without any issues. 
Please let us know if you have any further questions or concerns. 
Thank you again for your interest in Viewflow. 
Best regards,
NAME_2