On Windows, the TARA GUI setup.exe installs a .jar file that allows the GUI to run under the Java Runtime Extension (JRE). The taragui.jar file is located at \Program Files\Teradata\TARA\gui\bin.
On Linux, the TARA GUI .rpm package installs the taragui.jar file in /opt/teradata/tara/gui/bin.
To run the GUI, download the file to a Windows or Linux machine with JRE and double-click the file.