Can you try moving the installer exe to its own (empty) directory before running it?

The correct file is on the server (I just redownloaded and verified), so the most likely cause is that you ran a /layout at some point in the past and are getting that file locally. As you saw in the log, we will look in the directory the installer is launched from for a matching local file, so that it's possible to download all the optional components and then do a full install while offline.