I sent a ticket and got the following responce:
(for the record, I found the launcher and initially didn't run it as admin and it started to download and install fine.
You may need to run the launcher as an administrator. There are instructions below on how to do so:
1. To find the Launcher, you may need to activate 'View Hidden Files and Folders'
For Windows XP: - Open Start Menu and click on Control Panel. - Click Appearance and Themes, then Folder Options
For Windows 7 and Vista:
- Open Start Menu and click on Control Panel - Click on Appearance and Personalization Link - Click on the Show hidden files and folders ****on under Folder Options - Under the Hidden files and folders section, select the radio ****on labeled Show Hidden files, folders and drives
Now navigate to the folder C:\Users\Your User Name\AppData\Local\Apps\2.0\70GDA0RP.Y27\GZ5Y9HLY. C3C\laun...app_0000000000000000_0001.0000_14775cfa 4c94dd3f. It may be easier to search for Launcher.exe in the Start menu. Right click on the Launcher.exe and select "Run as Administrator."
I copied the launcher.exe and then pasting a shortcut to your desktop. Now on the shortcut, I did.. properties, compatibility. Set compatibility to Vista SP2 and check Run as admin. For the sake of thoroughness, I also went to the settings for all users and do the same. After applying and oking both it worked like a charm for me.