I have updated the software to v1.1 for the keyer so that the keyer mode and the slow and fast speeds can be set by programming the EEPROM with a simple text file. This is easily done with avrdudess or other tool. This means there is now only a single hex file instead of different versions for each keyer type. You can change these settings without having to rebuild the software - you don’t even need to install Atmel Studio if all you want to do is make the keyer and set your favourite mode and speed.