Tree Creator - Editting Node Count

This seems ridiculous, but I can't edit the count of my branch nodes. I can turn off the opacity of the layer, but no matter where I click, I can't seem to find a way to edit the number of my branchs, or bring up a properties menu. It makes for a bad looking tree. What am I doing wrong?

When your on the branch layer, there should be a slider called 'frequency'. This determines the amount of nodes, or branches, that will be placed on the tree.

Hope that helps!