Hi Pal,
1. The recent version doesn’t fix Theme Typography too, If you notice in Inspect Element window the style tags printed without the selectors only font-family
<style id="tt-font-tt-font-77-font-family" type="text/css"> {font-family: 'Arvo'!important; }</style>
2. Try to add a custom selector [.main-menu .nav > li > a] the plugin will convert [>] to [gt;] using a js library in your plugin and of course it’s v. bad because we’re using [>] a lot in css.
Thanks for your awesome work,
Have a nice day.