uninstall 프로그램이 따로 없어서 수작업으로 삭제를 해야하네요. 가이드가 있어서 링크 걸어봅니다.
MAC OS
http://www.native-instruments.com/en/support/knowledge-base/show/413/how-to-uninstall-native-instruments-software-and-drivers-from-a-mac-os-x-computer/
Windows OS
http://www.native-instruments.com/en/support/knowledge-base/show/1156/how-to-uninstall-native-instruments-software-and-drivers-from-a-windows-8-computer/