This is great news. I too bought the complete NIK Software back in the day.
I do use its noise reduction (hope DXO develops this further), and some pre sharpening. But the Silver Efex part of the package is fantastic with plenty of options and variations to convert my images into black and whites.
I've signed up for DXO emails, so will keep an eye out for an updated one. Will certainly look to purchase any updates as the NIK Software hasn't been updated for ages....