I'm working on a site for a client with translation needs. we got the free version, client wasn't happy with results. now we upgraded to pro version. in the settings there's an api key field but I'm not sure he ever got an api key. when we select a language, we get a 404 page not found error. reading your instructions I learn that gtranslate must be uploaded to the root directory. which gtranslate? the free or pro version? in which case what part of the installation goes to the root folder? any assistance will be appreciated. thanks.