This usually indicates your free trial period has ended, or the expiration date of your serial number has been reached. Go to the "About" dialog while using any plug-in, and it should tell you when it expired. If you acquire and enter a new valid serial number, the results should return to normal. Otherwise, please review the following list.

1. Make sure you have run the Tinder installer on your machine, rather than cloning, ghosting, or copying files from another workstation. If you installed by copying, just re-run the installer.
2. Make sure the date on your computer is correct.
3. If the Ethernet (MAC) address of your computer has changed since you ran the installer, you may get this watermark. One solution for this is to re-install Tinder plug-ins and re-enter your serial number. On Windows, this watermark can also occur if you change the enable/disable state of your Local Area Connection, which can be changed back by going to Start -> Control Panel -> Network Connections, and right click on Local Area Connection.