Changes

 With the latest C4CPC zip you may find that running the program reports 'libusb' not found or it doesn't find the device. Please follow the 'NEW' section below for success. OLD *After the reset, windows will look for the device drivers. These are located in the windows\dfu-prog-usb-1.2.2 folder NEW * Download the latest 'dfu-programmer' a) go to https://github.com/dfu-programmer/dfu-programmer/releases/tag/v1.1.0 b) Download 'dfu-programmer-x64-1.1.0.zip' c) Extract the contents d) Copy 'dfu-programmer.exe' and 'libusb-1.0.dll' from the extracted contents into the C4CPC 'windows' directory replacing and replace the exe already there.  * Run 'zadig' (https://zadig.akeo.ie/) a) Options->List all devices b) Choose ATm32U4DFU c) Install the 'WinUSB' driver.