To change the transmission segment, do this:
- open your calibration file (the one with the wrong trans segment),
- open the other file (the one with the correct trans segment),
- go Edit->Copy Entire Segment->Tranmission,
- go Edit->Copy Entire Segment->Transmission Diagnostics,
- go File->Save As, and give it a new filename (or simply allow it to bump the _0001 filename appendage).