LE is installed on the SSD, yes. No USB stick. It boots into LE.
This is going to sound silly, but ... the Mac Mini is hooked up to a projector via HDMI but in a place where I can't easily connect a USB cable for a keyboard. I have been using the iOS remote app, but obviously that needs network access which got disabled by mistake.
If it's really impossible to edit guisettings.xml, then I can order a 5m USB cable to reach the Mini.
I guess I'm just baffled that I can't edit an XML settings file and reboot.
Seems like a really basic, standard task on Linux, no... ?