Sunspot: Reset button doesn't work

1. Disconnect the Sun SPOT from the USB cable
2. Kill all the ant and java processes listening on the port
3. Hold the control button in for a few seconds until a double red flash indicates that the Sun SPOT has powered down (NB doing this *after* disconnecting).
4. Type this command at a command prompt:
ant -Dport=xxx upgrade
where xxx is the port name
5. Plug it in as soon as the ant script starts to complain that the port isn't available. *Don't* push the reset button: this isn't necessary and may confuse. 

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