I had installed the previous version of Advanced HTML Editor 3 in Dreamweaver CC on a mac running OSX 10.8.5. I installed the update with Adobe Extension Manager CC. When I launched Dreamweaver and opened an HTML file, the DMXzone installation wizard appeared for the extension, When I click NEXT or CANCEL I get the following dialogue "While executing onLoad in dmxAdvHTMLEdit30_install.htm, the following JavaScript error(s) occurred: in file "dmxAdvHTMLEdit30_install": initUI is not defined. It will not allow me to get beyond this dialogue and I have to force quit Dreamweaver. I have to remove the extension with Adobe Extension Manager CC in order to be able to use Dreamweaver. I can install other DMXzone extensions with no problem and the installation wizard works fine for the other extensions. I may have received another error message regarding the Next button not being able to continue but do not recall the exact words.

Hello,

Please clear your Dreamweaver cache: www.dmxzone.com/go/16740/clearing-dreamweaver-s-cache/

This worked. Thank you!