Ex. I hold thousands of files contained by a folder. I want to hold the files that contain the individuality "!" within the filename and delete the rest. All the utils I hold found simply allow you to specify what characters contained by the filenames you will to delete.. not hang on to.
Answers: Rename File Extensions programs and some neato apps nominated here could abet you ... jump here and pick out one that will suit your requests ...
approaching D-FileMU
In don't know of a tool but you could try it through DOS, and use a command strip.