Hello, I have accidentally renamed around 300 songs in my iTunes library which has then been updated on iTunes Match. Is there any way to restore my previous version of Match? I basically selected 300 songs by accident instead of the 3 I wanted and changed the Artist and Album name. So I now have songs from various artists / albums all with the same Artist name and Album name. I have iTunes Match on another mac but worried if I load this up it will copy my error over to my 2nd mac? Unless I can get my 2nd mac to update and correct my error? It's already updated my iPhone with match on it. Any help will be much appreciated!