On a PC
The Registration ID can be found in several places. The simplest way to find it is to look at the 'About Box'. You can launch this by either pressing the question mark in the top right hard corner of TCS or by going to the Help menu and pressing 'About TCS'.
The ID can also be seen when you run an unregistered version of TCS on the 'Demonstration Mode' box that appears on starting TCS. It can also be seen on the 'Activate Application' box when going to register the application as well at the 'Get Key' box when requesting a key.
On a Mobile Phone
Simply run the application and select About from the menu. This will display your Registration ID.