*** QMK Toolbox 0.1.1 (https://qmk.fm/toolbox)
    Supported bootloaders:
     - ARM DFU (APM32, Kiibohd, STM32, STM32duino) via dfu-util (http://dfu-util.sourceforge.net/)
     - Atmel/LUFA/QMK DFU via dfu-programmer (http://dfu-programmer.github.io/)
     - Atmel SAM-BA (Massdrop) via Massdrop Loader (https://github.com/massdrop/mdloader)
     - BootloadHID (Atmel, PS2AVRGB) via bootloadHID (https://www.obdev.at/products/vusb/bootloadhid.html)
     - Caterina (Arduino, Pro Micro) via avrdude (http://nongnu.org/avrdude/)
     - HalfKay (Teensy, Ergodox EZ) via Teensy Loader (https://pjrc.com/teensy/loader_cli.html)
     - LUFA Mass Storage
    Supported ISP flashers:
     - AVRISP (Arduino ISP)
     - USBasp (AVR ISP)
     - USBTiny (AVR Pocket)
*** STM32 DFU device connected (WinUSB): STMicroelectronics STM32  BOOTLOADER (0483:DF11:2200)
*** Attempting to flash, please don't remove device
>>> dfu-util.exe -a 0 -d 0483:DF11 -s 0x08000000:leave -D "C:\Downloads\K8_Pro_ISO_RGB_v1.01.bin"
    dfu-util 0.10
    
    Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
    Copyright 2010-2020 Tormod Volden and Stefan Schmidt
    This program is Free Software and has ABSOLUTELY NO WARRANTY
    Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
    
    Opening DFU capable USB device...
    ID 0483:df11
    Run-time device DFU version 011a
    Claiming USB DFU Interface...
    Setting Alternate Setting #0 ...
    Determining device status: state = dfuERROR, status = 10
    dfuERROR, clearing status
    Determining device status: state = dfuIDLE, status = 0
    dfuIDLE, continuing
    DFU mode device DFU version 011a
    Device returned transfer size 2048
    DfuSe interface name: "Internal Flash  "
    Downloading element to address = 0x08000000, size = 57948
    
    Erase   	[                         ]   0%            0 bytes
    Erase   	[                         ]   0%            0 bytes
    Erase   	[=                        ]   7%         4096 bytes
    Erase   	[==                       ]  10%         6144 bytes
    Erase   	[===                      ]  14%         8192 bytes
    Erase   	[====                     ]  17%        10240 bytes
    Erase   	[=====                    ]  21%        12288 bytes
    Erase   	[======                   ]  24%        14336 bytes
    Erase   	[=======                  ]  28%        16384 bytes
    Erase   	[========                 ]  35%        20480 bytes
    Erase   	[=========                ]  38%        22528 bytes
    Erase   	[==========               ]  42%        24576 bytes
    Erase   	[===========              ]  45%        26624 bytes
    Erase   	[============             ]  49%        28672 bytes
    Erase   	[=============            ]  53%        30720 bytes
    Erase   	[==============           ]  56%        32768 bytes
    Erase   	[===============          ]  60%        34816 bytes
    Erase   	[================         ]  67%        38912 bytes
    Erase   	[=================        ]  70%        40960 bytes
    Erase   	[==================       ]  74%        43008 bytes
    Erase   	[===================      ]  77%        45056 bytes
    Erase   	[====================     ]  81%        47104 bytes
    Erase   	[=====================    ]  84%        49152 bytes
    Erase   	[======================   ]  88%        51200 bytes
    Erase   	[======================   ]  91%        53248 bytes
    Erase   	[=======================  ]  95%        55296 bytes
    Erase   	[======================== ]  98%        57344 bytes
    Erase   	[=========================] 100%        57948 bytes
    Erase    done.
    
    Download	[                         ]   0%            0 bytes
    Download	[=                        ]   7%         4096 bytes
    Download	[==                       ]  10%         6144 bytes
    Download	[===                      ]  14%         8192 bytes
    Download	[====                     ]  17%        10240 bytes
    Download	[=====                    ]  21%        12288 bytes
    Download	[======                   ]  24%        14336 bytes
    Download	[=======                  ]  28%        16384 bytes
    Download	[========                 ]  35%        20480 bytes
    Download	[=========                ]  38%        22528 bytes
    Download	[==========               ]  42%        24576 bytes
    Download	[===========              ]  45%        26624 bytes
    Download	[============             ]  49%        28672 bytes
    Download	[=============            ]  53%        30720 bytes
    Download	[==============           ]  56%        32768 bytes
    Download	[===============          ]  60%        34816 bytes
    Download	[===============          ]  63%        36864 bytes
    Download	[================         ]  67%        38912 bytes
    Download	[=================        ]  70%        40960 bytes
    Download	[==================       ]  74%        43008 bytes
    Download	[===================      ]  77%        45056 bytes
    Download	[====================     ]  81%        47104 bytes
    Download	[=====================    ]  84%        49152 bytes
    Download	[======================   ]  88%        51200 bytes
    Download	[======================   ]  91%        53248 bytes
    Download	[=======================  ]  95%        55296 bytes
    Download	[======================== ]  98%        57344 bytes
    Download	[=========================] 100%        57948 bytes
    Download done.
    File downloaded successfully
    Transitioning to dfuMANIFEST state
*** STM32 DFU device disconnected (WinUSB): STMicroelectronics STM32  BOOTLOADER (0483:DF11:2200)