I Strongly Recommend NOT Downgrading To iTunes 9
Trust me. This is a DOWNGRADE not an upgrade. You don't want it. It destroys the iTunes Store Shopping Experience. No longer can you highlight a track and hit return to play it followed by the down arrow to highlight the next track so that when the one that's playing 30 seconds ends you can hit return to play the next one and so forth. No.
Now you can only play PARTIALLY VISIBLE playlist songs with a double click of the mouse. 
Plus they took away the Shopping Cart and replaced it with a LAME Wish List that you can't make into a separate window and which only displays PART of your list at a time. I mean this is the most UN-Engineered Human Interface I have ever seen Apple do. It's like the designers NEVER USE the Store. INSANE would be a kind description of what's been done here. 
Thankfully I was abel to revert to 8.1.2 this morning thanks to the Previous Library and my SAVED install packages from the past in my Downloads folder. Unless Apple puts back what they took away I will NEVER be advancing my iTunes version again. 