Diablo 3 doesn't finish launching
I have inner space pointed at diablo iii.exe, with the -launch argument, and it just hangs at the splash screen. I know it's supposed to be copying some kind of cache file, but it's not. There's zero disk activity, and I've let it sit there for upwards of 20 minutes with no change. My computer is very powerful, so even if it was copying the entire d3 install it'd have finished a couple times over. I tried pointing it at the launcher instead, but it doesn't fare any better. Either nothing comes up at all, or I get a small blue "starting battle.net..." that hangs forever.
When I very first started this, it looked like it was working, the first instance launched and was located/scaled correctly, then the second stayed on the splash screen for a long time, and when I killed them both off to try again now we're in a state of nothing working at all.