It's not downloading here, but that could be the link where I am.
But, as it is only needed to resize the book partition, I would recommend using the resize method in
Magic Memory Upgrade Mod . After installing the upgraded card, put the KoboRoot.tgz from the KoboRoot-MagicMemory-Resize-3.16.10.zip file in that post. Then disconnect the device and it does the resizing for you. I've done this a few times recently with no issues.