Mutoh edition only runs Mutoh printers. Since I think every Mutoh printer ships with Mutoh Edition Flexi, there's probably not much demand for that package. It could be used as an upgrade discount I suppose. Flexi should give some credit for that towards a full version of Flexi, but since it's only version 12, I'm not too sure it's worth much there either.
It could be used as just a design station though if someone wants that.