In apk I have path (igo installed in internal memory)
/storage/emulated/0/iGO_AVIC

So... Switch on GPS, set correct path (after OK press, you should see "Path found").
Go to apk main screen, look at "Service" - if it is "Stop" press "Start Service", wait few seconds while you get some info. Usually program beeps.
Using android's file manager go to iGO_AVIC folder and look at log_weather.txt file. Size of mine is 386b. Open file - you should see some russian text and also useful weather info.

If all above is OK, run igo nextgen, and wait a bit...
Thats all.