Ew, flatshade it.
ewFlatshade it
Late. As usual.
I honestly wouldnt know how to FlatShade it :p
Select All. Vertex > Unweld. Go to the groups tab. Turn auto smooth off. Vertex > Weld Together. Save. Export.
Select All. Vertex > Unweld. Go to the groups tab. Turn auto smooth off. Tools > Tile Texture mapper, check Cubic Vertex > Weld Together. Save. Export.