Rob and I met yesterday. We discussed the Launcher widget and he had a few changes which I implemented today. I also added some validation and exception handling to avoid user errors like selecting a directory they can't write to. I also added some button management code so the buttons are disabled if they aren't valid in the current context.
We also discussed the Replicator mock-up and found it to be mostly satisfactory. In retrospect, I'd like to find a form control that better displays the hierarchy of the runs to the parent scenario folder. Didn't have time today to look into this.