It turns out that they updated the Linux installer in place, without notifying anyone or changing the file name. Re-installing will update you to the latest version.
Also, I put an ebuild for the kobo desktop app in my Gentoo overlay, if anyone is interested. I have only tested it on amd64, if anyone has an x86 machine feel free to let me know if it works properly there. Here is the address of my overlay:
http://git.overlays.gentoo.org/gitwe...v/chutzpah.git