http://www.ddpai.com/update/m6plus/20160819/update.tar.gz
The above link is copied from elsewhere on this forum. It is an older firmware 'update'. I downloaded this to my PC. Virus checked it with norton, then decompressed the zip file and extracted it. I then copied the update folder to a clean micro sd card and inserted it into my camera, then attached power. The camera then 'updated' from the sd card which took a few minutes and then it sang its 'hello ddpai' announcement. If it says 'hello' straight away then it won't have updated, see my comment ** below. The camera name and password for wifi will be back to default settings. I have deleted the ddpai app and downloaded the RoadEyes app, as this also operates the camera but isn't able to update it, which is what I want at the moment. Camera now seems to be behaving itself, although it is still having a couple of wobbles on the time stamp front. The 'update' (or backdate) is version V3316
**If it doesn't 'update', just check that you haven't copied the update folder generated by the unzipping program, which if you click on, then opens the real update file (if you click on this you then get a list). The camera cannot navigate down through an extra folder if you get my drift.
Have been of face book and seen they have a new Customer service email, (which is:
Customer_Service@ddpai.com ) so I have emailed them with the problems I have experienced and will let you know when I get a reply.