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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
The problem is that Windows will install the manufacturer-supplied drivers for BLE - however there's no 'standard' for accessing BLE in versions of Windows below 8.1, so even though the manufacturer's driver has claimed BLE, there's not really much any application can do with it.
Zadig installs a general purpose driver which lets an application access the BLE device directly - in this case the Web IDE. However that means that the original driver no longer works (unless you run Zadig again and put it back).
Having said that, it's fiddling with the Bluetooth LE driver, not the Bluetooth driver (they're effectively different bits of hardware) - so you can still see and use normal Bluetooth devices as before, just not Bluetooth LE ones.