This software is on a commercial licence which means that for the regular user, a purchase has to be made towards the developer before he obtains the installation package to use the software. The same situation happens here because I can't test it to check its functions and features.
If you have it installed, go to Help > Contents. You will find there all the help that you need regarding the way the software works and its built-in feature like image rotation and others.
You can also search in the installation folder as well for PDF or CHM files which are usually manuals and user guides.