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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Bjørn
Yes, just uninstall it. It doesn't do anything useful.
It's designed to display the last digits of the Bluetooth ID (like appears when you connect/pair) so if you have more than one device (eg in a classroom) you know what you're connecting to.
It's on by default because it's quite common for unis/companies to buy more than one device and get running with them out the box, in which case they kind of need it. It's only a few seconds for you to remove it though