In normal mode type :Sex to split the current window and open Explore above it. Or :Sex! to split vertically. If the current window has no file, the current directory is opened (as shown by :pwd). (Also see :Hex, :Vex, and :Tex commands for slight variations). Navigate to a file name using hjkl, or arrow keys. Press R to rename a file. A prompt is shown that the selected file will be moved (renamed), and the original full path for the destination is shown. Change that path as wanted and press Enter to move the file, or Esc to cancel.