i do not have Avast. i did disable AVG antivirus but there was no improvement. so you know, i'm running Win7 64. i did also try to disable my windows firewall, even though it hadn't notified me that it was blocking your app. still no fix found.
to recap: the splash shows for a moment and then the screen goes black and i can see that an app named 88032.exe is running in the background... it doesn't seem to be frozen as it doesn't show Not Responding. my mouse cursor over the black screen app shows the blue wheel of infinite waiting, so i guess it's doing something.