Can you see the "Maps" folder?

If so, look for a folder within that directory that has your favorites.upi file in it.

If you can't find this file then make sure you have created one from within Sygic first. (Save anything ie: location, position, etc to favorites and Sygic will create a favorites file.)

Go back to the "Maps" folder and find out where favorites.upi now lives.

Place your custom poi file in that folder.

Restart Sygic and check your POI categories and you should now see it.