Schlaumayr: When the game was released I already had this problem, that the installation via galaxy failed. Even when I wanted to use the repair and verify option, this also failed, after downloading the gamefiles a second time. I had to use a trick I don't remember exactly. The problem here is, that you cannot just download it via Browser and install it then. Because stupid beta client galaxy does not recognize installed games without redownloading and reinstalling them the first time I start the client again.
Now the first update and the same problem again...

EDIT: I remember that I had to make an exception for the virus scanner at the first time... that's how it worked. But nothing changed, so what to do now?

Schlaumayr: Thanks for the quick reply, I am afraid I already tried the "Verify and Repair" check twice, no positive result :(

Schlaumayr: I am afraid the link is not working :/

Schlaumayr: Look at you saving this damsel in distress ^^ Thanks pal. Now I tried something out in the meantime. I downloaded the new offline Installer and shut down galaxy. Then installed Maize and when I turned galaxy on, it did not unnecessarily update an already up to date version of the game as so many times before.... WAIT...as I am dropping these lines, it started an update process and seconds later it says "Installation failure: connection problems" . Then my Wifi got reseted, what never happened before. Okay another update try... and again failure. Funny thing, I played the game for half an hour before all this... am I really the only person experiencing this trouble with Maize and the galaxy Client???