Yesterday, Apple has released iTunes 12.1 version (http://support.apple.com/kb/DL1614). TuneChef Plus ( both Windows version and Mac version) supports the latest version of iTunes now, but if you are using the version 12.0.1.26 of iTunes, you will get the 20X faster conversion…
How to Uninstall and Downgrade iTunes 12.1.x to 12.0.1.26 version
