Thanks Ray, error message not displayed when CS6 opens now, problem solved.
Ray added this line at 383 in "C:\Users\............\Web Assist\ Form Builder\Library\WA_Configuration.js"
if (!toCheck) return false;
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.