Important Note for ESPixelStick V1 / V2 and other ESP-01 based boards:
You must manually reset the board to see serial output in ESPSFlashTool after flashing. This does not apply to ESPIxelStick V3.
This release mainly addresses flashing issues on newer releases of MacOS. The included binary flash utility now utilizes the Python based esptool.py script for flashing. A portable Python binary for Windows is included in the release, so don't worry about that. This release is also compiled against the 2.7.4 Arduino Core. Our efforts have been focused getting on Unify (4.0) ready so that pretty much wraps this up.
Enjoy!