Firmware Request for RG520N-EU

Hi, the RG520NEU modules I’m using run on firmware version RG520NEUDAR03A04M8GA and suffer from intermittent random network dropouts. Could you confirm whether this is the latest available firmware version? If it is, please send me an identical firmware file for device re-flashing; if not, kindly provide the newest firmware build to my email: xietianzheng@foxmail.com. Thank you.