Composer 2.9.1 use driver wizard. Add all possible switching commands under custom codes. IN1OUT1, IN2OUT1, IN3OUT1, etc. When it's time to put the serial codes in, use quotes for ASCII commands like this "01V01." make sure to put a period . after each command inside the quotes. Try a couple of codes first to make sure it's working, then put in the other 62 codes.
I made a 4x2 driver with Driver Wizard fairly quickly, about 20 -30 min, but it was only 8 codes. it might take a while with 64 codes.