I have two devices on my free plan and want to add a third. I have a desktop and a tablet. I donwlaoded DB to my phone. I want to add my phone, Samsung S5, which would be my third device. When I open DB on my phone , the screen says: "Your plan supports up to 3 devices. You're trying to add more devices than your plan supports." Going to the unlink page I see the two devices registered to my plan, and my phone as "this device. How do I link my phone as my third device when the account won't let me? Thanks.