Click the "Browse" button and select the 1b.hex file you extracted from your car.
If you are having trouble with the process, I can offer more tips on: Finding map data Identifying if your car is CIC, NBT, or EVO What step are you currently on? Bimmerpost CIC/NBT FSC Generator - Windows/Linux/OSX - Page 19 bmwcicfscgeneratorwin32191 new
: Modern systems (ID5 and ID6) generally cannot have codes generated via these public DIY tools and usually require a specialized USB update or a purchased code . Click the "Browse" button and select the 1b