You can find the current version here:
He's been releasing a new one each day or so, as he's working on ironing out bugs and figuring out what does what.
From the readme:
If you can't edit any collections in the Raw tab in SaveEdit, you probably don't
have the full .NET Framework 4 installed, but have the Client Profile installed.
To fix this, install the full .NET Framework 4.
If anyone here uses it and could add to what works with it currently, what doesn't, etc that would be good.
Edited by Stiler2, 22 March 2012 - 04:45 PM.