I started it in DFU mode, but then I got this:
DFU device found, but can't get access : Operation not supported or unimplemented on this platform
Please install the WinUSB driver for the "STM32 Bootloader":
Launch Zadig (http://zadig.akeo.ie/) , select "Options->List all devices", select "STM32 BOOTLOADER", and "replace" the STTub30 driver with the WinUSB driver
No devices in DFU mode detected. To bring Axoloti Core in DFU mode, remove power from Axoloti Core, and then connect the micro-USB port to your computer while holding button S1. The LEDs will stay off when in DFU mode."
I replaced the STTub30 driver with the WinUSB driver, but still get the same message next restart in DFU mode...What to do?