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iGO 9 is iGO Primo.
See
here for a overview of the different versions available.
The fact it is a Chinese device suggests the iGO software is not entirely genuine.
So that means you should be able to replace the maps.
Look in the
iGO map section and download what you need...
Thispost explains what each file is, what it does and where it goes.
If you want to upgrade the software as well, make sure the new version has the folder\file.exe matched with the old version, so the executable path is the same