The software should have some FAQ page where you can see how to properly load a file. If it doesn't have, go to Help > Contents and look for instructions. In almost all cases you have everything that you need in that section. I tried to access what it seems to be the official website, but nothing was found due to the error displayed when the URL it's accessed.
Additionally, check the installation folder. You should find a PDF or CHM file related to how to work with the software.