options:
[-in <filename>] converts file <filename> to inches
[-mm <filename>] converts file <filename> to millimeters
[-d] sets the current directory as the source
[-d <dirname>] sets directory <dirname> as the source
[-o <dirname>] sets existing directory <dirname> as the destination
[-s] traverses subdirectories
[-u] converts udf files
[-uo] converts udf files only
[-x] exports the expressions of the converted part
[-y] converts entire assembly