My Tree Creator window has messed up labels?

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Hi, I was trying out the Tree Creator earlier, and I noticed all the labels for my options in the tree creator are prefixed with a TreeEditor.TreeGroupBranch and possibly more, as I cannot see anymore than that. I tried expanding the tab, setting it to debug and back to normal, and even reinstalling Unity, but it is still like that. Is it supposed to look like that? Do I have to import the Tree Creator asset from the Standard Assets from Unity 4? Thanks in advance.

Full size image here.

I solved the problem this way:
I installed the .NET framework 2.0-3.5 and reinstalled Unity (the latest official build 5.1.1f1) (first time I did vice versa).
Sorry for my English.