Using pcdMagic is easy - all you have to do is either to:
Drag and drop image files onto the pcdMagic window, or
Double-click image files in Windows Explorer.
Immediately on opening the file, pcdMagic saves a converted version of the file to the same location as the original file. You don't even have to save the file. It's that easy!
You can also use pcdMagic for Windows in more advanced ways - see the other articles on this site.