@MapleSimmer The other thing is that using Windows key + D does not work. The only thing that I can do is Windows key + Tab (thankfully, that's a feature nowadays). The problem is that full screen appears to persist on that window in the full screen mode, when it should be treated like a window. So even if I switch to that desktop window, the game's screen still visually appears.
Like, it's not generally a problem now that I have a way of exiting out. But that takes up a window, and I already have enough on my hands to manage simultaneously. This wasn't a problem with the previous version. I don't think DX 11 itself doesn't support it, but the game might have a bug in that mode somehow. It still does need tweaking though, but at least things run more smoothly when it runs.