As much as I enjoyed creating this a few years ago, I do not have time to maintain this at present. If Discord implement a better images system for RP and/or Roon improve extension integration I my revisit this. In the meantime I recommend using this implementation.
At this point in time you have to install NPM and run yourself. Installer is a feature to come.
We need Discord to allow more than 150 assets as there's a lot of album covers. If you want this feature then nag them.