Colors WP Mobile Menu

Hello! In what plugin files and how to manually write new colors for wp mobile menu. I initially chose the colors, everything is fine. I then try to change them, but the new colors selected in the plugin’s settings don’t actually show up in any browser. Although they are shown in the program settings. I’ve cleared browser cache (Firefox/Chrome) many times, but it doesn’t help. As I understand it, he rather registered them in the MySQL bath database? Because when uninstalling and reinstalling the plugin, it automatically selects them. How then to remove these settings from the MySQL database? 1. In general, it is highly desirable that there be an option to clean up the MySQL database when you uninstall your plugin. 2. And also the ability to reset all parameters to default, in the plugin settings! Thank you.