Currently, the AffiliateBooster Theme supports 1 main menu, and it can contain a sub-menu under that. You can customize the menu options inside Appearance > Menus.
Inside the customizer, you can customize the Main menu, the sub-menu, and the footer menu.
Inside the Main Menu options, you can customize the fonts of the Main Menu. You can change the font type, font size, height, spacing, and other options. Here is an example.
Inside the Sub Menu option, you change the font size, width of menu element, padding, and other typography options. You can also customize the duration before the hover effects take place. Here are all the settings and an example.
Inside the Footer Menu, you can customize the typography, default color, and hover colors.