I would like to know how can I update audacity from 2.1.1 to 2.1.2

Download one of the two Windows versions from here:


…and launch it (or decompress and launch it). The Windows version has an installer and should guide you through the install process.

It is intended that you do a straight, simple install and the new Audacity will automatically pick up all the preferences and settings from the old one. If you want to start over, there’s a place in the installer where you can select Reset Preferences.