How To Map Arcade Stick Buttons in "Combo Trainer"?

I just downloaded the program, new to PC gaming, I understand your supposed to edit the keyboard.cfg file? can I only map keyboard buttons?..they seem to already be mapped yet nothings happening when I load a combo… anything else I’m missing to use this program?..i REALLLLY didnt want to start a new thread, but I couldnt find anything about this online so I was hoping someone could help…