Thank you. I finally figured it out this morning when I woke up @5am (this issue had me anxiety ridden, haha). What I did, instead of adjusting my resolution, I clicked on the stuck window then I pressed Alt+Shift and in that pop up menu I simply clicked Maximize and voila! there was the dreaded pop-up screen that I was able to close and Proseries was back! Thank God! Maybe I can sleep tonight? 😴