Main window contains following tabs:
Running - here you can manipulate tasks, that can be run. You can download files, search for files and search for MP3.
Finished - here are automatically moved finished tasks from Running tab,
Local - shows list with the content of one of your disks - similar to the Explorer.
Favorites - you can collect some important tasks for further running.
Running, Finished and Favorites contain on the right side Info panel. It shows some details about a task selected on the list. Panel Info can be shown and hidden by pressing button 
or by Ctrl-I.
Click here for description of program options. If you have any problems please check troubleshooting.