I have a Folder with 25 Subfolders which house about 750 files.
All these files are in .rtf format.
However, the filenames do not have the .rtf extension.
(If I "tell" Windows they are .rtf they will open satisfactorily,
But I would have to do so for every file.)
Can I ADD the extension to all these files (at a single shot) using the Section 11
of the BRU by entering .rtf and pressing RENAME ?