Unity 5 tree creator not working correctly.

Whenever i try to insert a tree into my scene, it won't allow me to just drag the tree into the scene. However it works fine when planting the tree into a terrain.

Another thingi noticed is that all the tree materials get a blue-ish lightmap automatically. I've tried clearing all lightmaps and i've also changed all the scene lights to something thats not blue but it doesnt work.

Is anyone else having this problem?