First off, thanks for your quick answer.
The game was never installed using the client before I started the AC download; so it probably didn't have anything to do with the zip file ending up on C: . It may have been because the client foolishly ;) treats the download location in the user's profile directory as more important than the manually added directories.
Anyhow, the full download was on C: . The client showed the game as not installed, and when I clicked download again, it started the download at 0% again. My take? The client ONLY ever looks in the "default" location for games, even for the downloaded ZIP files. So it didn't look at the file it just downloaded to C: and instead started again from 0% on another drive.
And patching.. yes, I was hoping for this. It's kind of a drab to redownload AC fully every week with a 16 MBit/s line ;-)
Well, the client looks well-polished (and is for the most part).. these things just caught me in a bad moment :p
Keep up the good quality.
Thanks a lot and out,
Frederic