This item allows you to match the programmer software to the kit version that you have.
For example, if you have the K149-A programmer board, then you should select K149-A from the list provided.
This is normally accomplished when MicroPro first makes contact with the programmer board.
Some styles allow you to change a Reset Polarity. This alternates whether the programmer board resets with a True signal or resets with a False signal.
This function is there in case any of the MicroPro compatible programmer boards need a reset polarity change and will be advised in any upgrade notes.
See Reset Programmer for more details.