Missing files after reinstalling Cubase 9.5

Hi There,
I just reinstalled Cubase Artist 9.5. Almost fine, but it now says there are missing files for Halion Sonic SE when I load a project. And it is true I no longer have the different instruments (like Acoustic Grand Piano, for instance), only those from Flux are available. What shoudl I do to fix that? Thanks in advance. Regards.

more info: I now have 125 sounds in Halion SE 3. I think I had much more in my previous install. What’s the expected number?