I was able to update (from 1.9.5) manually from GNU/Linux (Ubuntu). Simply unzip the update file (posted earlier) to the .kobo directory. There should be a KoboRoot.tgz file and upgrade folder. Once there, unmount and unplug the kobo. It will upgrade itself.
Note: You may be able to get by with just the tgz file, but the uprgade folder might be needed for changes that have taken place in the update. Manual updates (i.e. hacking the software) probably just need the KoboRoot.tgz file. (This is probably duplicating some of the info available at
Beware of Soapy frogs)