In a book with 1,761 pages, I cannot be expected to precisely use the thumb-button on the scrollbar on the right of the screen to move the page as I read. I would prefer to do what the instructions recommend, and just press the down arrow to scroll a bit. But when I do so, ADE freezes for about 10 seconds, then puts me at the very end of the entire book. From there, pressing the up arrow takes 13 seconds before putting me at the bottom of page 1. This is a new computer with Windows 8.1 and a quad-core 4th gen i7 processor and 8GB RAM. It should be capable of smoothly moving a page up when ADE asks nicely. Any advice to make this software functional?