Adding Omnisphere 2 as VST Instrument in Cubase Pro 9.5

I have been able to add my CS-80 and Ivory to Cubase, but cannot for the life of me add Omnisphere as a VST instrument. What am I missing here?

Hi Bud
Welcome to the forum!
Could you provide a bit more detail please?
Just a guess, but have you rescanned your plugins,via the Vst Plug in manager?
,select VST instruments at the bottom pane on the right,is the rescan icon hover over that it will say rescan all

I did rescan, and no new instruments were found. It looks like I can manually add the folder location of Omnisphere perhaps? (But which folder?!?!)

Search your drive for ‘Omnisphere.dll’. If you can’t find it something went wrong with the installation.