4Knob Upright - How to access interface?

Cubase 11.0.30 | Halion Sonic SE3 3.4.30

I can access the 4Knob Upright patches in Halion Sonic SE3, but how do I access the 4Knob Upright interface?

I’ve got it working . . . moved things around using the Steinberg Library Manager, and then EDIT in Halion Sonic SE3 brought up the graphical interface.

(Have never used that plugin until now)

You are so lucky. I can’t even get this thing installed, keep getting the dreaded “Steinberg Library Manager Privileged Helper” version error.