None taken. You don't have to use it if you don't want to. I have not programmed this. However I have used 7+ Taskbar Tweaker for years and I would call it trusted program although it's not signed.

Latest beta version of 7+ Taskbar Tweaker has this feature: "Implemented the w10_large_icons advanced option, which changes taskbar icon size from 24x24 to 32x32."

Download here: 7+ Taskbar...