Since I am no expert in using Parasharas Light, the only thing I could recommend is the FAQ page provided by the developers on their website. Access the following link to read more about common problems, solutions, and guides.
Also, if you have the software installed in your PC, go to Help > Contents. Sometimes that's the best place to check for help, guides, and troubleshooting.
Of course, there is the possibility to get in touch with the developers using the details on the Contact Us page.