I'm pretty sure it did...
But, before downloading the new MC build, I swapped the Unisonar drivers for the Essence ST with the original drivers provided by Asus on their site (the Unisonar drivers were somewhat problematic when I changed settings in JRiver switching beetween different "zone", e.g. MCH and stereo settings).
I'm wondering if the Asus drivers stopped DTS from working in ASIO... Don't know, Just a possibility...