This tool is not useless 
It just "little" hard to use.
Just by reading attached .pdf and watching what buttons DialogEditor have, you have some idea what is needed to create simple quests. What demands you can set, what can be given as a reward and so on.
Point is, that even if someone actually know how to use DE look at this suggestion, it's totally useless for him, as there is not even general description how this quests have to work. What is required to start/finish the quest, what NPCs are needed, where to put them etc. Even if someone don't have technical skills, writing basic plot is always better than "add some quests". So problem is not in DE usage, but in quests suggestions threads construction. Including this one
