When you start Convert to MP3 command from Windows Explorer context menu you will see the next dialog:

Controls in this dialog are divided into three groups:

Press Start button to start conversion. At any time during the conversion you may stop the process using Stop button. In this case all successfully converted files will be removed from files list.

Note: If the file in the list is represented in blue color, it means that the generation of the output filename by tags is enabled and one or several tags which are used for generation are undefined for this file.

Note:If the file in the list is represented in red color, it means that there was a mistake during the conversion of this file.