Clear UV seams not clearing seams I want to clear UV seams on a object and remake them myself, but neither UV Mapping > Clear Seams nor UV Mapping > Reset Seems to work. Please see attachment images.

This is my mesh before i do UV Mapping > Clear Seams:



This is my mesh after I did UV Mapping > Clear Seams. Seams still present:



How do I fix this problem? I can't clearly cut my mesh while those seams are around.

Here is the scene:



I think this model was originally created in 3Ds Max.
There were no seams in the model the edges were marked as sharp so the only thing you have to do to clear those Ctrl+ E > Clear Sharp.