Halion SE and Groove Agent Libraries missing

I’ve just done a fresh install of Cubase 11 on a brand new PC, but neither Halion SE or Groove Agent libraries are showing. The *.vstsound files have been installed, I can see them, but the Library Manager only shows files one level down in the file structure so does not recognise them.

I’ve tried reinstalling but nothing changes. If I double click the *.vstsound it says it’s already registered!

Does anyone have any idea how to change this? Is there a config file for the Library Manger?