Symptom
Kontakt 6 does not appear in Native Access and only 'Kontakt' (i.e. no version number) is displayed.
Cause
While Kontakt 5 and Kontakt 7 are displayed with their version numbers in Native Access, Kontakt 6 is just called Kontakt.
The same applies to the name of the application and the plug-in version.
Solution
Proceed with the installation of 'Kontakt' when installing Kontakt 6.
You will find the software version number to the right of the product name listing in Native Access.