(replied to the email, replying here in case someone else gets it).
Try removing folders: library, system, settings and unpacking the zip again. Seems that there was a previous version in the same folder, some older files remained and caused problems.
Ah, I think I know what went amiss. I used the itch desktop client, and it's possible that it's download function just installed it right over top a very old version. Thanks for the help.
