With FileStar you can easily adjust saturation. Accessible directly in your right click menu for single or batch Png processing.
How to adjust saturation
- Download and install the latest version of FileStar.
- Right click on one or more Png file(s) on your desktop and select Convert with FileStar.
- Type adjust saturation in the search box
- Press Run.
About this skill
(Sorry this might get nerdy)