For BeardLib version, follow these instructions:

1. After downloading the mod, use a program such as 7zip or WinRAR to extract the main folder of the mod.
2. Navigate to assets/mod_overrides. The assets folder is supposed to be in your game's installation folder. Create the folder if necessary.
3. Move the main folder of the mod from step 1 to the folder you navigated to in step 2.