Renamer is a command line program replace instances of a string with another string in all files in the directory it is called in. 

Directions:  Add Renamer to your PATH.  Navigate to the directory containing the files you want to rename and run Renamer as follows

renamer "original string" "string to replace with"

Notes: This program was tested with Ruby version 1.8. The .exe, however, does not need any version of ruby installed.


Renamer (.exe file)

Renamer source (hosted on GitHub)