Removing it

Your songs, settings and catalog stay where they are, and the uninstaller names their folders.

• Windows: uninstall as you do anything else. The remote alone is its own entry, KM Remote.
• macOS: open /usr/local/karaokemachine and double-click Uninstall KaraokeMachine. It lists what it removes, asks, and then asks for your password. From a terminal, run sudo /usr/local/karaokemachine/uninstall.sh, with --dry-run for the list alone. The remote alone has /usr/local/km-remote and Uninstall KM Remote.
• Debian: sudo apt remove karaokemachine, which stops and disables the appliance service first. /var/lib/karaoke stays even on a purge, and sudo userdel -r karaoke removes it.
• Any Linux: delete the folder. If you ran its install.sh for a menu entry, ./install.sh --uninstall removes that entry.

Removing the machine leaves the remote alone, and removing the remote leaves the machine alone.