Seems like it is still crashing, yes. I'm using the game's built-in update rather than re-downloading the .exe though. Might not be properly overwriting something?
The totem for it is coloured in, at least. Not sure if that means the game thinks I've beaten it or that shows I've just found the boss.
Edit: Boss beaten. I see now that it's a spider, rather than some sort of squid. When I first tried fighting it, none of the background was loading. After updating in-game, that was at least fixed which made me think further updates were being applied properly. Felt something was off still when Aereal Dash remained.
At 2k health and 20 hp gone per mini-spider killed, that meant I had to kill 101 of those. They also seemed to die even if I missed.
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As for the missing totem, it was in a folder flagged so it'd only show up if "Hide protected operating system files (Recommended)" is unchecked. That'd explain why it wouldn't show up in Explorer searches.