Can't install plugins

Hey guys, I am trying to install the ACX check plugin. Downloaded it, and placed it in the appropriate folder as pic’d below. Yet it won’t show up when I go to Analyze-Add/Remove Plugins.Tried it with both the .txt extension and without, and works neither way. Appreciate any insight.
Screen Shot 2020-07-06 at 12.22.34 AM.jpg

Use these instructions to install Nyquist plug-ins (ACX check is a “Nyquist Plug-in”): https://manual.audacityteam.org/man/installing_effect_generator_and_analyzer_plug_ins_on_mac_os_x.html#nyquist_install

Also, ensure that you have the latest version of ACX Check (it was recently updated): https://wiki.audacityteam.org/wiki/Nyquist_Analyze_Plug-ins#ACX_Check