So iTunes was uninstalled, or are you saying a shortcut you may have had on your desktop or the task bar is no longer there?
Or that the iTunes application you have his now limited to only Podcasts and Books?
What happened exactly?
How do you usually access iTunes? From an icon on your desktop or taskbar? From the Start Menu? Some other way?
There is no new iTunes with Podcasts and Audio Books. iTunes, is iTunes and continues to do everything it has always done.
If you installed one of Apple's other Apps, such as the Music App, TV app, or Devices App, they will limit the installed iTunes version to just Podcasts and Books. But it's not a new version.
Removing all of the Apple apps except for iTunes should restore all the functionality back to iTunes including your music library access.