But! Just uploading the new .zip of the latest Casper release DID work for updating that over on https://uniteddiversity.coop !
[image: 1755362214416-1c440c12-0faa-425d-a966-34861ac87d75-image.png]
I hit Activate and got another little notification pop-up bottom right informing me it had worked. And doing the same with the Source theme worked over on https://nzts.info too!
But there doesn't appear to be any releases of the Headline theme https://github.com/TryGhost/Headline, so I'm not sure how I'm supposed to try to update that over on https://westdorset.news
...but I was able to find a download of it via https://ghost.org/themes/headline/ (clicked Install button top right, then download link in the pop-up...
And uploading that .zip worked too! (but it seems it's still actually on 1.0.0 which I was on anyway, so actually no change there).