Just watching How to whitelist VST2 instruments for use in Dorico (How to Whitelist VST2 Instruments for Use in Dorico | Play Mode in Dorico - YouTube), which seems clear enough.
However, to date I have only used VST instruments (other than Dorico’s Halion) within my old Cubase 7.5, which allows one to navigate anywhere within one’s C: drive to locate and add any of the plugins one has.
For Dorico, I’m not sure into which Windows directory I should copy my VST2 plugin .dll’s. Currently, I have some of them in C:\Program Files\VST plugins, others in C:\Program Files\Common Files\Steinberg\Shared Components, others in C:\Program Files\Common Files\Steinberg\Shared Components\VST2, and still others within the C:\Program Files\VST Plugins folders for each specific plugin.
Thanks, in advance, for any help you’d care to offer!