Spectralayers Licence and download

Please help,
I watched a video on Spectralayers ONE, Remove Vocals from a Fully Mixed Song with SpectraLayers One | Cubase Q&A with Greg Ondo - YouTube
went to use it it and could not find it, So i went to the Download Assistant but cant see version “one” so installed latest version 10.
I can now see the extension But when I load spectralayers it says that No licence is found, so I’m guessing its either wrong version or its because I’m running cubase 12 in trial mode?
Does spectralayers “One” install with cubase or separate?
I cant see the Extensions like in the manual
Activating Extensions for Audio Tracks

SpectraLayers One 9 can be downloaded from here in the Download Assistant, in the Cubase section:

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thank you