In many situations you start a new case and start digging into the Internet. In no time at all you'll recieve a tug on your line that someone is interested in something you have. You work the case one step at a time and soon close it only to start the next case.
With CATIE's built in Instances, you can work multiple cases at the same time without missing details or reducing your tools. If your license starts with 5 recording windows, you have 5 recording windows for each case. If you have Internet Explorer set to key logging, you can set the second case to not record the details from your first case.
Below as you click on each image you'll see how the main executable restarts and a different case is highlighted. The last screen shows multiple cases are running: