Have you got nvidia geforce experience? If not, download that and it will give you all the latest drivers, the engine part in daz is a drop down menu and it should be listed. I am really struggling to understand why it's not there other than drivers or, just thought of something, did you have Daz installed before the GPU, if you did then open daz central and download daz again, go to install it and it should upgrade you to the latest version and you will not lose any of your work, I would back that up though just to be on the safe side. Let me know how you get on, there's always someone that knows more that may catch the post and help you better.