Perhaps if a developer can tell me the exact database changes that need to happen, I can fix this manually? It's a small update, so what's going on in the db, just a version change?
Used WinSCP instead if FileZilla to upload everything again. Emptied cache again, deleted /store contents. Turned off Cloudflare and Litespeed.
Not sure what the problem was, but I suspect FileZilla is becoming an unreliable ftp agent. At least for me. This would be the second time it has not uploaded everything correctly.
Thanks for the help.
Edit 2: final thought: how about someone includes the need to switch to prosilver and deactivate any other style here:
https://www.phpbb.com/support/docs/en/3 ... date_full/
... you know, the way it's stated on all the other Full Update pages?