Reimagine the Bulk File Rename Utility icon in a minimalistic, flat blue style with two distinct blue document icons. One document has a bold 'B' and the other has a bold 'A'. A thick, clear blue arrow points from the B document to the A document. Use strong contrast, clean and simple lines, and ensure maximum clarity and recognizability. The background is fully transparent. The icon should be consistent with the other icons in style and clarity.emoji