Digitone refuses to reboot after firmware update

Hey all!
My Digitone seems to be stuck in the final stage of firmware updating. The final step; “OS UPGRADE SUCCESS! REBOOTING”, isn’t actually rebooting as it suggests. Is it safe to shut off or can I cancel this far in?

It’s getting slightly warm, and the lights are staying frozen (neither the buttons or display are currently moving), so I am a bit stressed regarding my own support ticket about it!