I tried to upload the firmware and I had a problem, and I share the solution
I was in my gameroom and I booted the pin2dmd EVO in dfu mode, using the power of a pinball. In the device manager of my PC, the device was saw as a stm booloader with an exclamation as the driver was not installed.
After installing the driver with the Zadig utilily it was worse, the device was saw as a serial device, but not dfu device and I was still not able to use the Dfusedemo program.
In fact, in my gameroom there is no wifi, and when the device was plugged in the driver was not automaticaly installed.
I desinstalled everything and made a manual install of the driver (http://deviceinbox.com/drivers/1157-stm-device-in-dfu-mode.html), and everything works !