The Top Menu

It's the menu on the top of the main window.
File Menu

In the File section you can:
The top menu contains also a Settings menu to change the application's settings:
Settings Menu

The Settings menu contains:

The top menu contains also a Script section, which allows to create and edit scripts to use in the templates.

Script Menu

In  the Help section you find all you need to understand the application and get help:

Help Menu

Another way to get help is to press F1 (or Ctrl-F1): it shows the help page about the current window.