when you turn your unit on, does it go to a menu selection screen? Or does it start directly the GPS program?
Most of the china GPS units come with some sort of front end.. If thats the case, then, most likely on the 2nd page, you should be able to change the path of the program.
Does your unit also have a microSD (TF) card slot on it as well? If it does, I'd suggest downloading a full working copy of iGo here, and then put the newest maps on it and then, in the front in, change the path, or, if you can, just drop to WinCE and double tap the iGO icon and see what happens..
I got lucky with my China one, as it has a front end, and gives me the option of setting paths to load the GPS program I wish, it also allows me to drop out into WinCE, and run it directly that way.
Read up on my other post about the China 7" GPS I got off ebay, and follow the instructions there...
http://www.navitotal.com/showthread.php?12659-China-7-inch-GPS-and-iGOHope that helps.