If you disable your Ethernet connection in the Network Connections control panel, Tinder may become unlicensed and render a colored dots watermark because it is unable to find the Machine ID of your workstation. To re-enable, go to Start -> Control Panel -> Network Connections, right click on your disabled connection, and select Enable. If you want to work without a network connection for security reasons, you can just unplug the network cable but still leave the network adapter enabled.