Download the current version (v0.6)!
Please note that it may throw a few errors at you the first time you run it. These are safe to ignore, but I recommend you close and open it again and it should work a little more smoothly from then on.
Previous versions, for your convenience/interest:
If you get some Windows Side-By-Side Configuration error, you may need to install the Microsoft Visual C++ 2008 Redistributable Package, which simply adds support for projects written in Visual C++, and it’s only a few MB. You should probably have picked it up from somewhere else already anyway.