Several Questions

Hi,
-You may try it again after clearing your browser cache and cookies. Often you can not see the change because of cached page by your browser. And if clearing the cache does not solve the problem, you may try disabling plugin and test again. I have just tested on my site and it changes footer style perfectly according to theme option setting.
-Yes, It is possible to change the color of fixed menu. To do that, You need to disable transparent menu first from Theme options>Header Options>transparent menu. and then save and refresh the page. You should see white background on menu. You can change the color of menu background from Theme Options>Style Options> Header>Background color.
I hope this helps you.
Thanks,
Kamal

You have the transparent turned on at the page level. Go into page editor for your home page, scroll down to options and uncheck transparent menu.

Or if you want it transparent to begin with, but white when you scroll, then put this in your child css.

.navbar-transparent .navbar .kleo-main-header.header-scrolled {
background-color: #fff;
}
.navbar-transparent #header .logo a, .navbar-transparent .navbar .navbar-nav > li > a, .navbar-transparent .navbar .navbar-nav .caret:after {
color: #444444;
}