I have 3 devices linked: ipad, notebook and desktop PC. It worked for years, but now suddenly the ipad app says "To link this device, try Dropbox plus. You've reached your plan's device limit." When I click the "unlink some devices" option it lists my 3 devices including "ipad: this device", so the app knows I'm not trying to link a new device, it knows it's on one of my 3 linked devices. Anyway when I select to unlink my notebook it says "to continue, you need to unlink 3 devices"