Read the User Guide and follow the exercise in the first chapters "Getting Started" and create the example catalog described in the chapters. In a couple of hours you will have a complete understanding of QE-Pattern Finder.
The User Guide can be opened in the program via menu Help, but can also be downloaded here - for example on a tablet or iPad.
RIGHT-click and choose Save Link Target as to download the QE-Pattern Finder User Guide.
Browse through this website to get as much information as possible:
Also be sure to watch the tutorial movie on this website to see the program in action.