[Theme: Virtue] How to align the primary menu to the left or right?

Hello,

I know this question has been asked sever times, however none of the solutions that I found (including this one: https://www.ads-software.com/support/topic/how-to-make-primary-menu-left-justified-instead-of-centred?replies=3) worked for me.

As you can see on my website (https://travelandshare.net), the primary menu is in the centre. Which CSS code do I have to insert to align it to the right?
Thank you in advance!
Greetings
Stan