Custom Logo in Header. Theme is RETRO (Premium)

Hello,

I’m having a premium theme named “RETRO” by olegnax. Currently, their support forum is unresponsive since I asked them questions few days ago.

Here is the header.php code:

[ 331 lines of PHP code redacted ]

I’d like to put a custom logo image in the center of the navigation bar.
Please guide.

Thank you!