How to Install Lame

I am a beginner in Audacity. Once I try export Audio in MP3
displaying as : Audacity needs the file lame_enc.dll to create MP3s.

I checked through audacity menu : EDIT, PREFERENCE, LIBRARIES, MP3 library Location.
Not yet installed. What is the way to install. Please comment.

Upgrade to the latest Audacity where you’ll find that LAME is built-in

BUT be careful there is a big blue DOWNLOAD button in a misleading advert on the Fosshub download page