Hi Stu
Your player is like mine here:-
[Review] Onda VX585HD from HouseofDap.com
Mine has been stable and had no such problems with crashes etc.
There is a reset hole on the side of the player, you need an open paper clip.
Might be worth formatting the main 8GB flash memory too as sometimes corrupt media can cause this problem.
I'll upload the user guide.
Cheers knob