While the launch services in OS X use file name extensions to associate files with various applications, generally users do not need to interact with these extensions and the system keeps them hidden ...

Managing files on an iPhone has become significantly easier with recent updates to iOS, particularly with the introduction of the ability to change file extensions directly within the Files app.

I wan tto change the file extensions for several files at one time as it is very tedious to change them one at a time. Is there a way to do this in Windows XP?