Just a quick fix for now:
Try to install older AmiKit (v1.7.0 or v1.6.0 or v1.5.0) and then simply let the integrated Live Update program update your installation to the latest version.
One note, though - the update process might take some time. After the updates are downloaded and you reboot the system, the next boot image will stay there for a looong time. But don't worry, the files are being updated in background.
Download the older AmiKit setups here: http://www.amigafuture.de/downloads.php?cat=33