Hi,
It might be a silly question but I have to ask.
Is Halion Sonic SE3 just an upgrade for SE2, or it is separate instrument?
It is an upgrade.
How do we get the upgrade? I can’t see it
You have to get the Steinberg Download Assistant and download through it.
I don’t think HALion Sonic SE3 has been released yet.
I’m afraid that you are right MrSoundman - as usual… 
I thought for a second that HS3 is that what I’m looking for…ugh.