I have downloaded and installed into Lightroom 3.6 - your application and it comes back with an error "Cannot Find Config .XML file"
However everything has been installed correctly.
Please tell me how to fix this?
The Juicebox plugin for Lightroom requires Lightroom 4 for full functionality (as stated on the Lightroom Plugin page).
Never Mind - it says this in the Lightroom window - but when I upload it, Juicebox works and works great...
As you have discovered, the Live Preview window does not function in Lightroom 3 but this does not affect the ability to successfully create a Juicebox gallery via the 'Export...' button.
I suppose, I need to buy for PRO to remove the link and word "juicebox"...
Yes. Juicebox-Pro automatically removes the Juicebox badge/link from the bottom-right corner of the gallery.
what else does the PRO version do?
Check out the Lite vs Pro comparison chart on the Download page.
For a full list of configuration options available to Pro users, please see the Config Options page. The Pro Options (which are not available to Lite users) are clearly marked in the side menu.