Updated OP to v0.6.4.
@astutejoe Downloading from scratch through the launcher took a long time for me this time. Download speed was all over the place. It could be at 9MB/s for a few minutes, then go down to 50KB/s for another few minutes. Took me about an hour to download everything from scratch, and I have a 500mbit connection ^^ I suspect this is because of all the small files it's downloading? If so, is there a way for you to compress all the small files, then have the launcher itself extract them after downloading? Or if the launcher don't see an old version, have it download the whole game as compressed, then extract it? I don't think I had the same issues with download speeds when I downloaded 0.5.1 btw.
Thumbs up for 21:9 support!
Menu and cutscenes are 16:9, but it's the game that matters