This is a different suggestion all together. Update the device manually. Here is how:
1) Install avrdude, guide here: http://www.ladyada.net/learn/avr/setup-win.html
2) Download the following firmware (2.0.9): https://raw.githubusercontent.com/rayshobby/opensprinkler/master/OpenSprinkler%20Controller/software/osFirmwareUpdater/Firmware/OpenSprinkler_v2.0/firmware2.0.9.hex
3) In the command prompt (the last step in that guide), put the following:
Replace “Downloads” with the path to the firmware file you downloaded in the previous step.
4) Finally, flash the OpenSprinkler hardware 2.0 with this command:
avrdude -c usbtiny -p m644 -F -U flash:w:firmware2.0.9.hex