I am a user of QA660 (x2) and QA100 (x3).http://1drv.ms/1nBAKyD
Click "Rewrite data 1.05" at the bottom.
Win7/8.1 64-bit only, created by the developer Mr. Yokota in Japan of "Bug Head Emperor" (a high-end music player free software for Windows 64-bit).
UI in English only. Document both in English and Japanese.
This software makes a bit-perfect copy of the original and overwrites it. Therefore, a copy should be made before trial.
Simply apply this program to the SD card, insert it into your QA660 or other SD card products, and a new world is waiting for you.
I posted to JPLAY forum as well.