I am all of a sudden experiencing issues also, when I try to modify form fields for a volunteer cycling website I now receive the following popup error message on an attempted change:
* Note: The Form Builder is read-only in this version.
This has never occurred before and I have updated the webform numerous times for track cycling events.
As I inherited this website about 10 months ago and had not originally installed this plugin I have no way of knowing if it was a basic or pro version.
Some advice would be appreciated?