I use the Advanced Color Selector, but another one suddenly appeared next to it, as shown below. I don't think I tinkered with anything... I only want the one on the left; how do I get rid of the one on the right?

that is called the "shade selector". On the top right of that docker, there is an icon you can click that gives you options. If you go to the Shade Selector tab, you should be able to disable it.

Thank you so much I have been trying to take the shade selector off for two days now thanks to you in a couple of clicks it was gone. thank you Scottpetrovic