Slitherine

Just got this game and only started playing. So far - great game, and I look forward to playing it a lot more.

Only one problem: when I view the map in overhead view, I lose sight of some of the lines and objects (such as the travel arc or the ship outlines). The background graphic interferes with them - either it's too bright or the colours too similar.

Anyway to alter or remove this graphic? It is merely an aesthetic item, so I don't mind removing it entirely. But if it's a graphic I can change, I will edit it to make the map and ships easier to view in that mode.

Thanks for any help or suggestions.

I use Steam and Win 10, by the way. I can't find where the files are located on my hard drive. Any suggestion where to look?