Hi -
Good to know that this is a "known problem". I have Vue 7 Complete, and it's the same thing. I tried reinstalling a couple of times, but with the same results.
But it's easy to get around, I have a summer larch tree, and a green lime tree  - just edit the colour of the textures for the autumn versions, or edit the bitmap in an PS or the likes. I've made some new textures for the lime tree (beech & oak) and they look okay.
(But I think the geometry - however much you edit the trees - will always look "Vue-ish" .That's why I still rely very much on my static models.)
Happy rendering

• Lars