You can download the NodeMCU Flasher in our website:

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

Instructions on how to use the nodemcu Flasher:

LUA connect to wifi (as WEBSERVER).ppt downloads: https://www.e-gizmo.net/oc/kits%20documents/ESP-11%20wifi%20shield/LUA%20connect%20to%20wifi%20(as%20webserver).ppt

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