cannot install the game

[Hakairo]

hey I wanted to play now after quitting months ago.
sadly if I try to install I get the message that there is a problem with the transformationspaket (i guess) here is the message i get (sorry for german): http://i.imgur.com/hFtLCzh.png  and if I try to use the german install I get the notification that the game is already installed, what is completely wrong. I looked into the registry and all my drives. there is nothing from BNS, just the setup.
any ways to fix this?

NOTE: I tracked down every file and registry entry that has something something to do with BnS (well, at least I am pretty sure I did)