Weird data editor bug

[Klasus]

All of a sudden my data editor stopped working, in the error message log I have errors like these: "[8/12/2012 4:51:29 PM] Warning: Unable to load image from 'Assets\Textures\btn-ability-protoss-wrathofadun.dds' (Core: a required object could not be found)"

The data editor is completely empty, If I open units for an example, there's nothing there! is it a common bug or do I need to reinstall the game?

EDIT: Lol, I feel sooo noobish right now. It was the folder panel that was dragged too far up.