I went back to version 21-01-25 because in beta 3 they removed this option from the on-screen menu. With this option, I could choose manual theme selection in the launcher to manually select the night theme as the default theme, and in the on-screen menu, I could set the backlighting to be managed according to the time of day. In beta 3, I was unable to get it to work this way, and during daylight hours, I was left with a blank white background in the launcher menus.
