Ok, thanks for uploading that, I’ve found the problem. It was a bug that meant that the material types were automatically assigned regardless of user input. The reason it only showed up in this tree is that the names of the materials aren’t very descriptive, so it just defaulted to giving them all the “trunk” type.
I’ve fixed it now, so it should be released sometime in the next few days. In the meantime, to fix it, just add the word “leaf” to the leaf material names, and that should make it work on the old version.
Hope that helps!