My Folder location reset itself to the default

Question

No matter how I try to change the default setting to where all of my music is, it still does not find all my music. I know it's there though! If I click on a song it can't find, I tell it I want to find it, and there it is right in the folder I told iTunes it was. This came about very suddenly. Plus, it recognizes some files but not others. There is not rhyme or reason to which it recognizes and which it does not as far as I can tell. I'm tired of having to click on the songs I want to hear, search for them, and then hear them. What can I do?

Answer 1

Do you have a backup of your iTunes LIbrary.itl file from BEFORE this happened?
If you catch it right away, what you did should work. (Closing iTunes, enable exHD, start iTunes)
But if you've made changes (such as clicking on ! items and finding them), you are sadly out of luck on having everything exactly as before.
In the furture you can make regular backups of the iTunes library files to avoid this sort of thing.
http://docs.info.apple.com/article.html?artnum=93732