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Got a little bit further after tinkering and have got to 'When you find that folder (on a Mac) or a file called iTunes library.itl (on Windows), click Choose on a Mac or OK on Windows', I can see the hard drive with iTunes on it, there are 5 folders, Automatically add to iTunes, Downloads, Mobile Applications, Movies and Music, I can see under all that is an empty box with file name and then iTunes Library files (*.itl), but there is no OK button, only open