Converts images in a batch (bulk,massive) way - ideal for a post-editing phase. There are several graphical filters, being the most useful one, when creating web pages, the quantization (color reduction) one - the color scale in a professional way. This version of the app is easier to setup, because it creates shortcuts. The Portable version of the application is portable - it can be run from a pen drive, but it does not create any shortcuts. For Windows XP you must use the portable version of the application; for Windows Vista, 7, 8, 8.1, or 10 you can use either version.