Thanks for reaching out and thanks for using Venetian WordPress theme with BoldGrid Post and Page Builder!
I think I may have already responded to you here. One thing you could try is navigating from your dashboard to Customize<<Menus<<Social Media and that should bring up the same menu options.
If you want to remove the Social Media Menu altogether you can do so from that section as well under Menu Locations, just uncheck the menu from all locations to remove it.
I hope this helps. Please let us know if this works for you.