The Fastest Way to Change File Extension

To make my files look uncluttered, I hide the file extension. Consequently, I had to go to the Folder Option menu to show it up again every time I needed to change an extension. Impractical, wasn't it? So it was quite a big hand for me when I discovered this Extension Changer.

With this tiny software for Windows user, all you've got to do is right-clicking any file you want to change the extension, select the option Edit the extension to pop up a mini dialog window, and type the extension you demand for. That's it.