I’m trying to experiment a bit to get rid of mouth noise without extensive editing. I pasted the “ny” file into the plugins folder (and I unzipped it too). Nothing about noise gates shows up in the menus. The effects menu just has the good ol’ noise removal tool. The Nyquist version is either 2.1 or 3.0.
On Windows you can jump down the Effects list to find effects more quickly - for example to find “Noise Gate”, open the Effect menu them press the “N” key a few times and it will jump down to the next effect that begins with “N”.
The effects are in alphabetic order above he line, and then alphabetic below the line.