Since Presonus Support is of absolutely no help whatsoever (for darned near everything on this forum- AHEM) I thought I'd let folks know that updating to the Jan. 30 2018 Universal Control 2.5.2 fixed the problems I was having. I can now connect my iPad as well as my phone (Google Pixel XL) to the Studio 192 and everything works as expected. HOWEVER- my Surface Pro 4 will still not connect via wi-fi to my studio computer- but I'm good for now.
As long as I'm here, I have to give a GIGANTIC thumbs way down to Presonus Support. They are completely MIA, and when they do respond it's only to say "Please open a ticket" with a poll attached to it, and then that gets ignored. Like everyone on this board, the money I've invested in your products is not insignificant, and I expect to get at least some kind of interaction, and yet none is had. I love my Studio 192 as well as my DP88's and my Faderport, but when something goes wrong with them my blood runs a little cold because I know full well that I'm on my own in trying to fix it. Luckily, I'm pretty tech-savvy, but not everyone is and I'm very sure that others are having the same issues I've had with far less luck. I also realize that since Presonus support is completely MIA, they most likely will not see this post, but I had to get it off my chest. PLEASE, support dudes and dudettes- your customers are your life's blood and they need your help. Do your jobs and give us the support we need since we are doing our jobs out here supporting you by purchasing, using and evangelizing others to your products.