As you may know, if you copy a lot of info from Excel, and paste it in to MediaLab Experiment Editor, you end up losing much of your pasted data when you close Media Lab and attempt to re-open your questionaire later. I stumbled on a work-around for this problem.
1) Copy your data from Excel and Paste into MediaLab Experimenter Editor.
2) Go to the very last line of your MediaLab questionaire.
3) Click on 'Details'
4) You'll notice that details of the last line does not open up. Rather, it's the details from line 4 or so. Click on the checkmark to exit out of details.
5) Repeat step 2-4. The next time you open details, it will be for line 8 or so. Keep repeating steps 2 - 4.
6) Eventually, you will actually get details for the last line of the questionaire. At this point, it is safe to save your questionaire and exit MediaLab. Your data will still be there when you open the questionaire back up.