LR used to automatically open in my external monitor where I always use it. But the newer version keeps opening on my desktop. I create 5-10 catalogs per year and switch between them, and each time, I have to drag it back to my external monitor and click to go full screen. Also, I cannot seem to disable the backup feature. I have Time Machine so do not need to back up the catalog separately. Too many clicks getting in and out of LR!