It's been a while since I test drove the VZ editor. Does it use the Jazz-Soft plug-in? If so, do you have that installed? Sorry, but I don't remember. Also, if it does use it and you have it installed, try different web browsers. I do recall that over the past year or some, some web browsers made some changes.
If we were;nt expecting a heat wave, I'd offer to do some tests to see if I can get the editor working, but my brain stops working when it gets too hot.
Steve