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Wolfram_von_Thal: Hello,
Dex doesn't start - when I click the shortcut or the exe in the folder (with administrator rights, Windows Vista, I've also tried other compatibility-modes) nothing at all happens. There is no process in the task manager.
Does anyboy know what I could do?

EDIT: I have to correct myself: If I start the exe and look at the task manager, the process "Dex.exe *32" appears for a fraction of a second, then disappears and nothing happens...
Could you send us a Support ticket with your DxDiag as well as the Unity output_log.txt for Dex attached?

Please visit this link: and select "launching issues" as the problem type :)