Hello, I reinstalled windows, but I kept libraries and instruments on a separate drive. Native Access found them automatically and I downloaded Kontakt 6 and other apps (I own Komplete 12) .
But Kontakt does not see any library. I downloaded Kontakt 7 player which sees all libraries.  I checked installation notes of  some libraries and for example Analog Dreams says that minimal version of Kontakt is 7.6.  Most libraries has no installation notes though. 
I don't understand it, but I suspect that Native access updated libraries so they are not available for Kontakt 6.
I appreciate any advice. Thanks