VST Plug-in Manger doesn't delete unused plugins

I’m trying to delete a VST yet when I select it, the “Delete” option (icon) is greyed out.
What underground code do we need to break to simply remove an unused plugin?

Welcome!
How do you remove unused plugins?

Do you mean delete it from your hard drive or remove it from the plugin list?

How do you remove it from Cubase all together?

go to the folder on your system and delete it, if you are on Mac its under machdd/audio/plugins