Acou6tics version 1.1 is available for download now. It would have been nice if they had mentioned in the update announcement that you need the latest version of Kontakt (which came out last week) for the instruments to load. Grumble.
Edit:
What I should have added:
I've been using Acou6tics since it first came out. I like it.
I have the full version of Kontakt.
After I installed the Acou6tics update 1.1 I couldn't get it to load in Kontakt. There was a confusing error message.
I found out I had to download the latest version of Kontakt (which had come out one week previous) and then everything worked fine.
So just in case someone runs into the same issue, I was just saying you need to update Kontakt first and then the Acou6tics update.