To create a new group click the New Group button from the toolbar, or right-click anywhere in the Groups/Jobs listing in the left side of the screen and select New Group from the drop down menu. A new Group item will be added to the Groups/Jobs listing labeled as "New Group". The new group item will be placed in edit mode, allowing you to change the name of the group:
Enter the name for the new group and press [ENTER]. The new group will be added and you can then create new jobs for the group: