gameObject with two Transforms crashing the editor glitch!

I am making a Unity project and I create all my 3-D objects on Blender.
After completing a new object, I wanted to prefab it, so I replaced my
old version of the prefab with the new one, it said, " Possibly unwanted
replacement: do you want to replace this prefab?"
and I said yes. But then instead of replacing the prefab it combined the
two prefabs into one. So part of the object has two Transforms and it
would crash Unity whenever I would try and delete it.
So I tried to delete the glitched object one part at a time. But that
made it so I can’t even open up that scene anymore.

Is there any way that you can delete a GameObject without opening the
Unity Editor? I am using a Mac OS X 10.7.5 with Unity version 4.0.0f3.
I tried looking at the editor log and the end of the log said this:

Receiving unhandled NULL exception
Launching bug reporter

*** Launching bug reporter due to crashbug.
Obtained 0 stack frames.

So I know where the glitch happened I just need to know if I can delete
a GameObject without opening the Editor and that should fix things.

Thanks!

Now that’s the time you need to start using a version control system. Never develop a software without a VCS. I prefer SVN. Some people like GIT.

With a VCS, when you corrupt a file, you can go back and get the good one from the version history.

And don’t forget to enable “force text” mode and “meta files” in the editor settings of your project before start using a VCS.