Cut trees returned buildings in mid air

[mountainboomer]

Not sure how this happened but all the trees I cut down have returned. I leveled a bunch of ground for a huge equestrian area. The terraforming is gone and the buildings are floating in mid air. I have done a bunch of work before I noticed. I assume the map.xml got hosed somehow?

Solved:

Copied a previous terrain.heightmap.png file to the game folder and life is better. It missed some terrain changes but at least my buildings are once again on the ground.