Theme Horse

Most of the other plugins I use seem have frequent updates which I get notified of and can do with a single click. There is a message on the revolution slider page that recommends and offers premium support and automatic updates but asks for an api number and envato account but i don’t understand what these are? I don’t seeanything about this in the emails I got when buying teh Interface Pro nor in the downloadeded zipped folder. When I try to manually update, it doesn’t work and states soemthing about having to update over the ftp??? I don’t get what all this means?!