I believe you have to download this manually from the website to install it. The PA installer seems to only have the non-Classic version.
Edit. It shows up in the installer now.
If you're in the EU you should be able to get the deals from Audiodeluxe without any tricks and the prices are basically the same (they have the deluxebucks bonus system).
I haven't upgraded (yet), but believe in Opus you can download even single instruments/sounds if you want, as Guy Michelmore demonstrates here.
https://youtu.be/CTqsxR_z9X8?t=270