Feedback for KB 000044122 - device in failsafe, NO GUI - need to use SFLoader to boot other firmware

The advisory document https://support.sophos.com/support/s/article/KB-000044122?language=en_US mentions to rollback the firmware via the GUI. However the appliances are in failsafe and the GUI has not booted. Rollback is only possible via the boot menu/SFLoader.

The article should list these instructions on how to boot an alternative firmware when the GUI is not available.

Thanks,
Matt