Yeah.
I created two copies of SD Chan called Test1 and Test2.
Two dialogues with just the Dialogue_name set, All:"CLEAR", and an Intro line that said which Test it was.
Saved with the characters.
Went back to SD Chan, cleared the currently loaded dialogue, and closed SDT.
Reopeded SDT.
Selected Test1, checked to see what Dialogues was loaded, the default.
Same with Test2.