The software is not open source to be able to modify it the way you please. It's under a free license and it's available for download from the official website. I suggest you study the details on the mentioned website to find more about the licensing terms, downloads, and other related details.
You can also access the Shop from the URL available on the page. After installation, the BUY NOW link in the main menu bar will offer a few options to buy the layouts for The Right Track Software.