auto-update-from does not work for windows. Not even manually. It downloads the releases file, the toast appears that says it is downloading the update, the log appears that says that it is downloading the update, but it never makes the request to the update server to actually download the .nupkg file. Strangely auto-update-to works. (which starts with the latest release and then updates to the newly packaged one)
and auto-updating from an old dev version also works. it seems to be the fact that it is actually downgrading from the new package to the most recent release that breaks it? Can't see any other difference.

Maybe this? https://github.com/Squirrel/Squirrel.Windows/blob/51f5e2cb01add79280a53d51e8d0cfa20f8c9f9f/src/Squirrel/UpdateManager.CheckForUpdates.cs#L185