Upgrade / downgrade

None in this alpha. Uninstall (sudo /home/<user>/quantumtouch-installer-1.2.0-01/uninstall.sh), then reinstall with the new bundle. State under /opt/bng-deploy/data, /var/lib/quantum-controller, and /opt/quantumtouch/data is preserved by uninstall.sh for the settings + Prometheus TSDB paths (see the script header for the preserve/purge matrix), but for alpha we recommend a clean install per release to avoid unexpected state carryover.