Hi @Friend_DE,
Sorry to hear of the problem you are having.
I could confirm the issue on my test site and it is also not displaying in the theme settings therefore notified the theme developer about this so that it will be fixed.
The issue will be fixed ASAP.
In the meanwhile you can change its size by adding the following CSS code in the Custom CSS code option of your theme on the below path.
Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code
.header-logo img {
max-width: 500px;
max-height: 100px;
}
Best regards,
Shufflehound team