The user interface was made to allow for both simple and complex conversion jobs. To perform a conversion task, first specify it in the upper area of the user interface, and then click the Add button (in the upper toolbar) to add it to the 'conversion task list'. If you are only going to have one conversion task, then don’t bother with the Add button.
Once there are one or more tasks in the task list, you can press the Convert button (also in the upper toolbar) to initiate the conversion job.
You can build conversion jobs, consisting of one or more conversion tasks, which may be saved, restored, and edited. Once saved, they may be specified and run from the command line, or the built in scheduler making automating complex tasks a snap. See the file menu for saving and restoring conversion jobs.
Once a conversion job is complete, you can view the status of the process in the Log Tab located near the bottom of the user interface. Any error messages will show up here.
More:
Putting It All Together
Saving and Restoring a 'Conversion Job'