Buttons and Sliders

@rodeboy: Hello Chris,
Go to => Appearance => Customize => Additional CSS and add the following CSS Code.

/* Promotion Headline button */
#ct-about-2 .btn-transparent, #ct-about-2 .btn-transparent {
		background-color: #fff;
		border-color: #fff;
		color: #000;
}
#ct-about-2 .btn-transparent:hover, #ct-about-2 .btn-transparent:focus {
		background-color: #123345;
		border-color: #123456;
		color: #fff;
}

/* For featured content buttons */
#featured-content .btn-transparent, #featured-content .btn-transparent {
		background-color: #fff;
		border-color: #fff;
		color: #000;
}
#featured-content .btn-transparent:hover, #featured-content .btn-transparent:focus {
		background-color: #123345;
		border-color: #123456;
		color: #fff;
}

You can change the color according to your choice.

You don’t have to disable the slider within the theme. You will need to
Go to => Dashboard => Catch Slider Pro => Create new slider and add the shortcode on post/page where you want it to be displayed.

Let me know if this helps you out!
Kind Regards,
Skandha

@rodeboy: Hello Chris,
For instructions you can check out this link and click on Instructions tab.

Have you inserted a slider anywhere on your site?
Kind Regards,
Skandha

@rodeboy: Hello Chris,
The slider created using Catch Slider should display well on mobile devices as well. There are lot of options that you can explore.

About the updating issue can you let me know which version you are using and are you still having the notification issue?

Kind Regards,
Skandha