Tutorial to downgrading iTunes 9.2 to 9.1.1 ( windows - Mac )

Tutorial to downgrading iTunes 9.2 to 9.1.1 (PC version)

1. Back up your iTunes library. Go to c:\My Documents\My Music\iTunes and copy the entire folder to a separate location
2. Download iTunes 9.1.1 from here 
3. Uninstall the following 6 programs : iTunes 9.2, iPhone Configuration, Apple Mobile Device Support, Apple Application Support, Apple Software Update, Quicktime (Make sure you uninstall this)
4. After uninstall all six items, reboot your PC
5. Now open file explorer, go to c:\My Documents\My Music\iTunes and locate the file name iTunes Library.itl, rename it to iTunes Library.itl.bak (this is your backup)
6. Still inside iTunes folder, look for the folder Previous iTunes Libraries, inside the library there are a number back up itl files with the dates as their names. Look for the latest file before you updated iTunes to 9.2, and copy that file to the c:\My Documents\My Music\iTunes folder.
7. Rename that file as iTunes Library.itl
8. Double click you iTunes 9.1.1 installation file and let it install. Once it’s completed, you should find your iTunes exactly as it was before.
9. Keep that iTunes Backup folder somewhere, you will thank me for this later.

Tutorial to downgrade iTunes 9.2 to 9.1.1 (Mac Version) 

1. Download the old iTunes 9.1.1 DMG file here.
2. Quit iTunes (if running)
3. Kill the iTunes helper process (using Applications -> Utilities -> Activity Monitor)
4. Launch Terminal app (you can search Spotlight if you don’t know where it is)
5. Type the following in Terminal prompt (Be very careful with this step, this could cause your system to malfunction if not properly done.

• % sudo mv /Applications/iTunes /Applications/tmpTunes
• % sudo mv ~/Library/iTunes ~/Library/tmpTunes
• % cd /System/Library/PrivateFrameworks/
• % sudo mv MobileDevice.framework/ tmpMobileDevice.framework

A safer way to do this is to use the Finder to move these folders. You should be able to find these folders easily :

/Applications/iTunes is the actual app,
Right click and select Show Package Contents, and copy all the files to a new temporary folder called iTunesBackup, then simply rename the App to iTunesOld and drag the App icon into the iTunesBackup folder as well.
Same with the /Library/iTunes folders, create a new folder within iTunesBackup/Library_iTunes/ and move all the files to there :

• MobileDevice.framework should be located at /System/Library/PrivateFrameworks/MobileDevice.framework, move those contents to a newly-created folder called iTunesBackup/Frameworks/

If anything goes wrong you can always revert back to the old files.

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6. Go to the folders /Library or /System/Library to see if there’s any other iTunes files, if so, move to the temp folder as well. Make sure you have separate sub-folders inside the Temp folder, just in case you forget where the original files are from. (There shouldn’t be any files in these two folders anyways, but just in case)
7. Now move the entire folder from ~user/Library/iTunes to the iTunesBackup/UserLibrary/. (Again, create this folder yourself)
8. Go into ~user/Music/iTunes and copy the entire folder to iTunesBackup/MusicLibrary/. (Also, a new folder)
9. Still inside /Music/iTunes, delete the file iTunes Library 
10. Go into ~user/Music/iTunes/Previous iTunes Libraries and locate the latest file prior to your recent update to iTunes 9.2. (There is a date in the name for the library files). If you updated iTunes on June 22, then look for a file named iTunes Library 2010-06-21 or the latest date you can find prior to 2010-06-22.
11. Copy this file to /Music/iTunes and rename it as iTunes Library (so, just delete the date portion of the file name)
12. Double click the iTunes 9.1.1 DMG file you downloaded earlier to install
13. If it says there’s already an iTunes app with a newer version, go into iTunesBackup folder and delete the iTunesOld app
14. That’s it.