Better discord is a sort of software improving discord by allowing you to install plugins. You can find the code source/the latest version here.
- download the installer
- install and restart discord
- in settings, you got new menus including plugins menu
To install new plugins, what I do is
- settings > plugin > open the plugin folder
- copy and paste a plugin inside the folder
- the plugin can be found here
- go back to discord and don't forget to enable the plugin
- if you have a problem updating a plugin, backup the plugin data file and reinstall it.