Just unplug the device from the computer it's in and plug it into the other one. The first time you move it you'll have to wait a very, very, short time while the software installs into the new computer (it really doesn't take long at all). After that, the software is in the new machine for future use. If you wanted to you could always uninstall the software after you were through using the device with the second/new computer. (You don't have to go through the thing with setting up your account info that you do when you first buy the device, by the way.) That first time is only because you're a new account-holder.