like any other icon, you can simply place the one you want in your parent or child theme images folder and it should be used instead of the one with the plugin…

understood, but I had copied all the image files from reboot to the child theme and don’t see a darker one. I did just check here on mobile and saw that this one is darker so I “borrowed” it. 🙂 Thanks MP

It’s one of those where the plugin supplies the icon, and you can use your own over the top if you wish by doing as you have done. So by copying our icon from here and placing it in your theme – It will do the job of overriding the icon that comes with Plupload.