Have you always run mods, or did this issue occur with a clean, "vanilla" installation of DCS as well?
If the former, while not an attractive option, you could try installing a clean copy (if possible, alongside your modded copy), to see whether that makes a difference.
I did notice that you have the "Audio Output Type" option on the "Audio" tab of the VoiceAttack options window set to "Windows Media Components", which is a legacy setting ("Integrated Components" is the current standard) that's recommended by the third-party VAICOM for reasons I'm not personally aware of; were you using VAICOM at some point?