Yes it automatically logs in and goes to the refresh screen. Now if I remember to watch it, I can go in and manually cancel it. But again there should be an option to turn this feature off.
I have also used the USB refresh and what I don't like about it is that basically you can't use the device during the process. But I have also noted that it logs in and refreshes automatically using that route as well, unless manually canceled.
This is what the manual says;
The Slacker G2 starts this process automatically when you plug it into an
AC Outlet. In addition, you can start the refresh process manually. In order to start the refresh process, you connect to the Slacker Radio service one of two ways: WiFi or USB.