In b82, I made a change to some Updater code, to avoid an issue when a book file of the same name was found in another folder. That change broke the system used to determine if GCA had matching files that needed to be updated, because it could no longer determine that any files matched those in the update.
I have implemented a fix for this. Older versions of GCA may see complaints logged about some XML stuff, but the older updater should still work fine to update to this version, it’ll just think every data file needs to be updated, when it really doesn’t. That’s fixed once this update is applied.