I just bought a used Bose qc35II and the prev owner did somethign with the FW so it now show that it is a Bose SoundSport. Official BTU says it has the latest FW (For that product) so I cannot replace the FW with the official tool...
I just downloading and installing your tool but I wonder if there is any way to skip or disable the check which is for the connected device and for the FW which will be loaded. I know its a safety feature but in my case it would be a help I think...

Error: this file is not for the selected device: file for 05a7:4020, device is 05a7:4012

BTW the device enter and leave DFU as I see from the messages.

Thanks,
Gabor