Choose the Update submenu item to update benchmark
  files.

  Use this submenu item to create the first benchmark
  file for a noninteractive test or to replace the
  existing benchmark with the current test results.
  You can create a new benchmark file from the existing
  result file for selected result descriptions.

  To update a benchmark file, a result description
  must have a comparison status of comparison aborted,
  unsuccessful, or new. DTM automatically deletes the
  result file for successful tests.