I went to open my itunes and it said "itunes needs a library to open" then it would only let me choose a library that was dated to last july. I clicked on it and it opened my library from that date. I am really mad because it will now only open that library and im missing almost a thousand songs that have been downloaded since then. Why can i only open a previous library? Are all the songs, movies, and other settings that i have changed in the last 6 months gone? HELP!