Press Install ffmpeg button if you want music features. NOTE: RESTART YOUR PC IF YOU DO.
Press Update and go through the installation wizard. NOTE: If you're upgrading from 1.3, DO NOT select your old nadekobot folder. Install it in a separate directory and read the upgrading guide.
When installation is finished, make sure Open credentials.json is checked. NOTE: Make sure to open it with Notepad++ or some other decent text editor.