That solution you reference is, as the poster said, already built-in to the addon, back in May.
So:
a) make sure you've properly installed all the relevant files
b) make sure you've added any additional language files pertinent to your site
c) make sure you have no addons that are conflicting
d) make sure your browser is properly loading javascript (not disabled)
e) make sure your browser doesn't have broken cookies/cache, by clearing them and resetting the browser
As you say, it works fine on several of your sites, but not on another one. So, the problem must be in something you've done specially different on the one where it's not working.



