I've searched for information related to Bagatrix Geometry, but it appears that the software isn't available for public testing which makes it very hard to provide an answers to this inquiry. The best way is to start the program and then use the built-in Help section to find out how to operate with the software.
Secondly, go to the installation directory and look for PDF or CHM files which are practically user guides that teach you how to work with the application.