Hardknott64
edison-image-700476e9.7z contains a 64 bit image in ext4 and btrfs, ready for flashing with the supplied flashall.sh (flashall.bat has not been updated, we will accept patches for that). Once you flash the btrfs image you can send btrfs 'snapshots' containing a 2nd image. edison-image-edison.snapshot.7z has an example of that. See https://edison-fw.github.io/meta-intel-edison/6.2-Transferring-a-new-btrfs-image.html
bullseye-image-edison.snapshot.7z has not been updated. Go to the release Gatesgarth64 for the most recent version.
Release notes: https://edison-fw.github.io/meta-intel-edison/0.6-News.html