You can download in our website the ESP8266 Flasher.

Here's the link: https://www.e-gizmo.net/oc/kits%20documents/ESP-11%20wifi%20shield/ESP%20flasher.zip

Instruction on how to use the flasher:

ESP-11 Shield Manual: https://www.e-gizmo.net/oc/kits%20documents/ESP-11%20wifi%20shield/esp%20wifi%20shield%20manual%201rev0.pdf

Download Firmwares: https://www.e-gizmo.net/oc/kits%20documents/ESP-11%20wifi%20shield/Firmwares/