I'm using UVmapper Classic. I'm too broke to buy UVMapper Pro! I did select by vertice. Don't believe Classic has an edge vertice tool (does it?). Define clean side/side division. Since the obj contains both boots, I had to do a bit of manipulating to get a left and right side for each boot, and then had to do some work to separate out the vertices at the edge. I went to each edge vertice and blew it up several times to see if it was really only one vertice or if it was two. I think it really takes six beans to make five.