[xubuntu] Weird crash?

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http://ubuntuforums.org – Hey guys, I was using xubuntu and I was trying to close the "explorer equivalent" on my computer and it crashed. Now, what do I mean by "explorer equivalent?" I am talking about the thing that you use to go through your files, folders etc. In windows, it would be called "explorer". Now, I am stuck with something that is more primitive and it is really annoying to use because I can't, for example, hit the middle mouse button to upon a different folder in the same window or use the middle mouse button to open a file, rather than double clicking o (Hardware)