post_upgrade() {
  if [[ -d /opt/sabnzbd ]]; then
    # Test for the *old* config file and *lack* of new config file, move if needed.
    if [[ -f /opt/sabnzbd/sabnzbd.ini && ! -f /var/lib/sabnzbd/sabnzbd.ini ]]; then
      cp -a /opt/sabnzbd/sabnzbd.ini /var/lib/sabnzbd/
      mv /opt/sabnzbd/sabnzbd.ini /opt/sabnzbd/sabnzbd.ini.saved
      echo "Copied sabnzbd.ini from /opt/sabnzbd to /var/lib/sabnzbd and renamed /opt/sabnzbd/sabnzbd.ini to /opt/sabnzbd/sabnzbd.ini.saved."
    fi

    # Test for old admin folder and *lack* of new admin folder, move if needed.
    if [[ -d /opt/sabnzbd/admin && ! -d /var/lib/sabnzbd/admin ]]; then
      cp -a /opt/sabnzbd/admin /var/lib/sabnzbd/
      mv /opt/sabnzbd/admin /opt/sabnzbd/admin.saved
      echo "Copied admin folder from /opt/sabnzbd to /var/lib/sabnzbd/ and renamed /opt/sabnzbd/admin to /opt/sabnzbd/admin.saved."
    fi

    # Test for old logs folder and *lack* of new logs folder, move if needed.
    if [[ -d /opt/sabnzbd/logs && ! -d /var/lib/sabnzbd/logs ]]; then
      cp -a /opt/sabnzbd/logs /var/lib/sabnzbd/
      mv /opt/sabnzbd/logs /opt/sabnzbd/logs.saved
      echo "Copied logs folder from /opt/sabnzbd to /var/lib/sabnzbd/ and renamed /opt/sabnzbd/logs to /opt/sabnzbd/logs.saved."
    fi

    # Suggest removing /opt/sabnzbd.
    echo "Remove /opt/sabnzbd if everything is working correctly from /var/lib/sabnzbd now."
  fi

  # Check and change the sabnzbd users home directory
  SABNZBD_HOME="$( getent passwd sabnzbd | awk -F: '{ print $6 }' )"
  if [[ "${SABNZBD_HOME}" != "/var/lib/sabnzbd" ]]; then
    if usermod --home /var/lib/sabnzbd sabnzbd; then
      echo "User sabnzbd home directory changed to /var/lib/sabnzbd."
    else
      echo "Error changing sabnzbd home directory, stop sabnzbd and run 'usermod --home /var/lib/sabnzbd sabnzbd' yourself."
    fi
  fi
}