I failed to use Platform Flash Tool Lite to flash firmware.
It always shows that edison cannot connect with the PC but I can login edison by using PuTTY just as showed in the following video.
https://www.dropbox.com/s/5uhkm3iwie14ly7/20160822_235406.mp4?dl=0 Dropbox - 20160822_235406.mp4
I don't know why.
In case you haven't done it yet, please follow up these easy steps for flashing your Intel Edison board manually in this link /docs/DOC-25154 https://communities.intel.com/docs/DOC-25154, there you can find all the steps necessary to do it.
We hope you find this information useful, if you have any issue with this please contact us and we'll be happy to help you.