Just upgraded to 5.7 and now when I'm in Lightroom the Loupe window that's on my second monitor jumps to the first monitor and covers the Library window. When I quit and restart the program it works fine until I leave that desktop and then when I return to the desktop that Lightroom is on the same thing happens with the Loupe window. I just have to turn off anything in the second monitor otherwise I can see my Library window. Never had this problem until today when I did the upgrade. Running OS 10.10.1 on a Mac Pro.