Effects menu and plug-ins

Hello, I’m using Windows 10. Some of the effects shown as enabled in Nyquist plug-in installer are not appearing in my effects menu. Does anyone know why not?

Have you recently updated Audacity?
Which version are you using?

Depending on the plug-in, some appear in the “Generate” menu, some in the “Effect” menu, some in the “Analyze” menu, and some in the “Tools” menu.