Hello. When I received nRF52DK, I have successfully uploaded some examples also with softdevice through the Keil IDE. But after few days Keil and also Segger IDE stopped detect my nRF52DK, but it's still available as USB storage. So I can upload .hex file through copying on USB storage, but I can't flash my programs from IDE. To decide this problem I've reinstalled IDEs, J-Link v.20i, nRF5x-command-line-tools, restart PC, but I have no results. Thanks in advance. Hope you will help me.