Library of Exile is a library that is required for the Age of Exile mod to work, as well as modpacks based on it. For other purposes, it is not currently used, so there is no point in downloading the library separately. Do it only if the instructions for the mod require it.
How to install Library of Exile
- Make sure you have installed Minecraft Forge.
- Download the mod for your version of the game.
- Put it in the ‘mods’ folder, which is located in the game folder.