I have had to do this so many times that it is the 1st, 2nd and 3rd thing I try every-time I have a problem with any of Webassit extensions.
I remember a previous problem where the .js file was replaced in a webassit support folder but that was a few versions ago and I would have thought that this would have been resolved by now. I have uninstalled every Webassist extension and re-installed,Trashed the cache so many times that I have a shortcut to the file on my desktop.
There must be other remedies.
Everytime I buy a new extension or upgrade from Webassist I go thru the same problems, and so on and so on. VERY FRUSTRATING!
I run Mac OSX 10.6.5
MERRY CHRISTMAS TO EVERYONE