I can confirm that using this file means the following path:
*C:\Program Files\Native Instruments*
Shows up on the VST paths dialog between Dorico 3 restarts. However, even in this case a blacklist file is created and/or entries are created for Kontakt. It doesn’t matter if I delete the blacklist file or simply remove the entries manually. Even when I confirm “Kontakt” is on vst2whitelist.txt, and even when I manually move the entries from Vst2xPlugin Blacklist VSTAudioEngine3.xml over to Vst2xPlugin Whitelist VSTAudioEngine3.xml, for whatever reason, Dorico continues to blacklist Kontakt.
Hm, very strange. I need to discuss tomorrow in the office with my colleagues what can cause Kontakt to get blacklisted. Please wait.
Ok, I look forward to a resolution, I’ve got homework to finish! 