Also I have tried several raster to vector S.W.
I think Vextractor v3.94 is very good but RasterVect v13.4 is the best -for my task-
unfortunately the trial version doesn't save
So.. still looking for RasterVect v13.4 (or any other previous version)
By the way I have a Portable version of Vextractor 3.94
Here is the link if anyone interested in