I love your plugin and I have used it for a long time. I have a few questions:
First, I don't understand what all your plugin parameters do, and it's not explained anywhere.
Second, what is "Main Cost Items" in the Tree Builder app? I thought it was going to help position the tree by giving the Unique Identifier, but it must be an integer.
Third, the trees are not positioned correctly when I first open them and the whole thing should fit in one screen. Is there a way to fix that?