Hallo Anne-Marie,
Since October 2024, we've changed the style of our T4A maps to display better on the newer GPS devices. Unfortunately this also means that it makes a change to how Basecamp displays the map on the computer.
When you install the maps onto your computer, you have an option to install the "T4A Optimised" style, or to untick this to get a simpler style, which is what is shown in your screenshot.
When you install the "T4A Optimised" style, your screen in Basecamp looks like this - you can now see the difference between the 4x4, gravel and tarred roads.
This display is also more in line with what we use on our trip planner and guide app:
https://map.tracks4africa.co.za/map. There is a legend that shows the type of roads, which is pretty similiar to the roads in Basecamp.
I hope that helps!