WTF, Sparkle is now called Sitely on the Mac App Store. When did that happen? It looks like it happened a week ago.
I assume my Mac App Store license hasn't been downgraded in terms of features.
It looks like I have to set shit up again. Supposedly this allows only one website, but it's acting like I'm trying to publish a second.
Tried Sitely > Settings ... > Remove caches. No Go on Publish.