Cubase 10 scanning whole C Drive for VST plug-ins

Hi- Can anybody help me please?

Cubase 10 has just started scanning the whole C Drive (or even more!) for plug ins and I haven’t manged to get in to the programme yet. I saw Cubase Preferences mentioned as a possible fix somewhere but I’m not sure how to get to them without being within Cubase.

Many thanks


Thank you, worked really well, much appreciated.