This is the main window of BCArchive where you can see the Generate Random seed buffer that displays a progress bar which will show you the progress of a new archive generation 

The Edit menu allows you to add files or folders or to create new ones. You can also access the Compact function from here 

In the Archive menu you can see a list of actions that you can perform with the archives. You can extract all, make self-extracting file, synchronize or add/remove keys 

The Options menu only allows yout to select the software's languages. You may choose from english and german