how to eliminate the seams from my blender model in sp

i have searched the entire web and i cant get an answear to this i have made a simple object in blender and uv unrwraped it and have been trying for days to mask its seams dissaper then i made a cube beveled it uv unrwraped it and i cant even get rid of its seams. i tried tri planer projection and reguler projection and the clone stamp nothing works can anybody help me

1.blend (482 KB)wooden_shutter NO UV STRATCHING one mor e time2.blend (1.13 MB)