Hi, thanks for your prompt response.
I’ve managed to resolve the issue - browsing through other similar threads such as Firmware Update Failed w/ UI version 0.9.2 - #5 by mliberty, I noticed that some people encounter issues when connecting USB via a docking station (as I do). When I plugged the Joulescope into my laptop directly, the “bulk_in error” issues are resolved and the firmware update works. Unless there is value in attaching the log, I think we can consider the issue solved!