Thanks to everyone for your feedback. I really appreciate knowing which features to add that people will like and use.
I have added a new button, "Register New Device" to the side menu on the website, where the "My Items" button is, below the "My Email Address Book" button.
Once you click the "Register New Device" button you have about a minute to register a new device. The new device that you are registering should have the same email address that your account uses, in their settings. After registering the new device you should be able to import items/prices to the new device from your account.
You should now be able to register an unlimited number of devices to your account. Please let me know of any issues/problems anyone encounters with this new "Register New Device" button.
Thanks,
Jim