The time of the map just changed to night?

A friend of mine was modifying my map, and when send me a version to test it, I noticed that the color of the map was changed to night somehow:

The new and darker version

The old version

Any of you guys know how to fix this? (I want it back to the daylight version)

Try the lightning editor. Window>Lightning(Ctrl+shift+F10)

Oh, I figured it out with the light, now it's only the minimap which is dark?
You also got a solution for that?