Seems like a promising tool, but it's currently very buggy. I highly recommend backing up your normal map ( as I did ) before working on it, as the program has a habit of ignring the filename you choose to save under and instead overwriting the file you loaded.
If it doesn't run, you need 3.5 Beta 2 of the .Net Framework installed.
If it doesn't run, you need 3.5 Beta 2 of the .Net Framework installed.