HSO and NEK5.5

I updated my N5.1.1 to N5.5 but I can’t find this anywhere:
From the Steinberg website:

“Trial version: HALion Symphonic Orchestra VST Sound Instrument Set
The NEK 5.5 contains a 60-day fully functional trial version of the HALion Symphonic Orchestra VST Sound Instrument Set. Evocative scores, exquisite arrangements and emotive accompaniments: HSO VST Sound Instrument Set for HALion Sonic SE and HALion Sonic is the ideal, symphonic library for composition, production and pre-production in music, TV, film scoring and game sound.
Existing HSO users will be excited to find out that they can use HSO VST Sound Instrument Set with their existing license as a free update right away! For all others, the trial version of the HSO VST Sound Instrument Set can be upgraded online to a permanent license at a very special price”.

I already own HSO 16bit. But I can’t find these new sounds. In Halion Sonic I can see only 3 library, no HSO library.
NEK5.5: I downloaded the two parts and used the installer of part 1. It seems to me that everything went ok. Do I have to unzip and use the installer in part 2 too?
Any help appreciated.