Our interface uses the Prolific Technology CH340 to serial interface which is a popular device and superior to CH340 in our view.
Software can be downloaded from here: https://www.empoweredcycles.com/products/usb-programming-cable-8fun-bbs02-mid-drive-motor
Please note: you must run the programme as administrator
Parameters can be altered to suit your needs. Only change parameters that you understand. Learn as much as possible before you change values and always make a backup copy of the settings.
Here is a link for some useful information:
Programming The BBS02 & BBSHD Without Frying Your Controller And Losing Your Sanity