I'm just guessing here. But is there a way for you to choose "show all files" somewhere on your computer? Also, do you have a restoration CD that came with your device? It might have the files you need on it.
EDIT: I also saw this elsewhere but I'm not sure if it applies to you - but it's probably worth a try: Unlocking BT GOCLEVER 5065
1. Install the nav program on the SD card.
2. On the same card (not greater than 2gb) Create directory MobileNavigator
3. to this directory copy the file from the folder .exe
4. rename the .exe file to mobilenavigator.exe
Click on the icon NAVIGATION:)