I don't know how, but a large amount of the Resources have gotten messed up.
So going through and updating via the Edit Resources window, is slow but okay... until I come to everything that is inside the .xbExport file, which being a Package, I can't access the files within it from the Edit Resources Dialog, in order to update the Resources. 😕
I've tried re-running the Action for a gallery (redoing Select in the Actions window) but it hasn't changed anything.
I've also tried going back to a previous vs of my FW file, via Time Machine, but it produced the same errors.
Any ideas what could be going wrong?