Where do I re-download Halion Symphonic?

I have only today realised that the old instrument was defunct and that the library is now meant to work in HALion Sonic SE. And I so I had installed the instrument first, before realising that. I have since installed the new Sound Set over the top. But I suspect I need to uninstall the HSO instrument … and start again.

But is it critical where the Sound Set sits? Is the folder within a folder the correct location?

Thanks—M