When I go to
files -> options -> appearance -> colors -> général (maybe “general” in english) -> binder background
and change the color, it works, but next time I open scrivener, it looses the new color. Instead, it shows the default color of the mode that I initially chose from the standard options. It does the same if I saved the custom theme or options. To see the color I chose, I got to go, again, to
files -> options -> appearance -> colors
then click on “appliquer” (apply?) or on OK, then come back in the main scrivener window.
I use French, windows 10, beta 188.8.131.52 (64-bit)