The official website for this application is in Chinese language. I have tried to translate it, but the information couldn't be found which means you will have to take advantage of the built-in Help section. Go to Help > About and then you can read about all the topics which include the features and functionalities of the software.
Note: Additionally, check the installation folder for PDF or CHM files. Developers usually place user guides and manuals in the installation folder next to the other files.