Go grab it here: http://www.miraigamer.net/forums/showthread.php?t=1478
The file is a bit chunkier in size because Version 0.4 comes with:
And here are the major changes:
-Secret missions 1 and 2 (in chapters 1 and 2) are easier to find, so you might want to just start a new file
-Chapter 3 has a lot more cutscenes (and some cutscene fixes), so you’ll want to play through that
-Chapter 4 is chocked full of brand new content
-Portal gun is unlockable, although it’s gameplay is rather untested and will likely lead to skipping parts/cutscenes if intentionally abused.
-Not sure if old saves will work with this version