The tournament editor allows you to set important details about your tournament. It is the first window you will see upon launching the program.
You can add events to a tournament by clicking the Yes! button at the bottom of the window. Doing so will expose a simple Add Event editor:
Select a game from the drop-down list, or enter a new game if yours is not listed. Choose the entrant and bracket styles for the game, pick a date (set to the event's date by default), and press Add to create the event. Click Done to hide the editor.
You can find the game you just created by clicking the Events tab at the top of the screen. Your new event will be the last tab on the Events page.