It requires a security key to run the programmer… Unless there are cracked versions floating around. Back in the day it was a green serial dongle, which changed to USB in the 2000s and is now a registered license key. But there might be ways around it that I don’t know about.
Also, the revision matters! The programmer is based on the cpu revision, so you would need to make sure that whatever programmer you get (assuming you can run it) is compatible with your CPU. (I think 4100+ revs are 8.06 thru 9.2.22)