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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.
@Gordon
Yes, there's the bootloader version and the main bangle.js firmware version. It should have worked fine. Really not sure what happened there, but maybe for the next update you could give it another try? You can always recover with NRF Toolbox.
If it works for you that's great. If you look around the forum you'll see loads of posts from people that didn't fare so well though (especially on iPhones), so really the App Loader's firmware update should be safer. Also if it fails you've got the option of using the NRF app as a backup!