With the official release of iOS 10.3.2,
macOS 10.12.5, tvOS 10.2.1, and watchOS 3.2.2 to public, Apple has also
released a new version of iTunes 12.6.1 for both Windows & Mac.
iTunes 12.6.1 includes minor app and performance improvements.
Apple has also released a new version of iTunes 12.6.1 for both Windows & Mac. You can download iTunes 12.6.1 through Mac App Store under the Updates tab.

You can download iTunes 12.6.1 through Mac App Store
under the Updates tab

Likewise for Windows, you can use the Apple Update Tool to
install iTunes 12.6.1 update or simply head over to this link https://www.apple.com/itunes/download/
to update iTunes.