Theme too big for screen, resulting in vertical scrolling.

Hi, I’ve found an absolutely wonderful theme that I’d love to buy, with different layouts but… two of them have vertical scrolling, and do not generally display as thought.

It’s both the “Minimalist Versions”, and I’m browsing from a 13" MacBook Air (1440x900).
I know it’s mainly up to the developers to answer this, but they’ve not been active in the recent time on their comment section (I don’t know why, so I won’t judge), and therefor I came here.

I just want to know if this is an easy fix? Cheers.