Update to 5.5.1

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Hello Forum
I'm using greensalad as defult theme for a site, but after getting updated to latest version 5.5.1 - something is changed in the header section.
Here's the site -http://www.wedele.dk

Normally the website logo "Wedeles hus" was placed up in the left corner, with the header menu in one line.
But after getting the update - The Logo is in the bottom of the header - and Nav.menu are now in 2 lines.

How can I get the Logo up in the top and the menu nav in one line!