This is from the 0.2.9 branch of development. Our current releases are derived from here.
Changes in AppImage Land: Our AppImage files now are signed and support bandwidth-saving updates via AppImageUpdate. They no longer carry their version in the filename because after an update, that would be a lie.
We now support installation via Flatpak for the 64-bit Linux client. Get the stable versions from Flathub; our own repository has those and also carries the usual test builds.