I’m looking into this urgently. Over the past 18 months we have had a very small number (5/6) Crumbles die in this way, but recently there’s a couple of users (including yourself) that have had more than one Crumble fail, which is new.
I’m wondering if there is something specific about your machine that is causing problems… Is the PC that the problem first occurred on running Windows 10?
The Crumbles are recoverable by reprogramming them here – the problem is caused by memory corruption. I also have some changes in the software that should make the programming process far more resilient, which I hope to release soon.
If you were able to return the Crumbles in the SAE so I can confirm my theory, that would be very helpful!
All the best,