Interesting. I had not noticed it there.
The copy I have came form the Samsung site.
After experimenting, it would appear that the phone is too new and the software doesn't recognize the phone. May be a need for newer drivers too.
New PC Studio 1.5 seemed to come the closest, but it said unrecognized device (or similar).
So, we need a new version of the software that knows about the S390G. It's unlikely that Samsung will release one though. I saw a few versions that appear carrier specific (for more recent models), so it looks like Samsung is not releasing versions that support all devices now. I doubt TF will pay Samsung to release a version either.
TF is just starting to allow BT file transfers, USB connections, and other advanced features.
ST or NET10 look to be the route to go with the Android phones (or the SIM card option for BYOD and better droids and iPhones) but I'm not paying $45-50/mo for cell phones (and I have to cover 3 now).