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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.
@Kim
Hmm, this sounds strange. Could you elaborate a bit more on what you are doing? Do you have the Espruino connected with USB to a PC? What operating system? Are you using the Espruino environment in Chrome? Have you been able to update your Espruino to the latest version?
Finally, do you see the LEDs when you prepare the Espruino to install a new firmware? For this, press and hold the button marked BTN1, then press and release the RST button and finally release BTN1. You should see the lights flashing when you do this. You can then reset the board by pressing the RST button again, which should turn off the blue LED again.