Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I had this problem too. To get surround through the digital output you have to set your primary output device to 'Speakers' instead of 'S/PDIF Out' before enabling DDL or DTS Connect. When you enable the encoder the drivers will automatically take the audio stream from the speakers, encode it...