Super Reader, a bit overweight / confusing

I bought the reader response to the recommendations and, above all, because I put in contrast to the "free version" to display PDF's value. Overall, I am something of satisfied. Solely the setting are so varied that you will soon no longer be overlooked. Had the settings more divided, there would no longer complain much. Unfortunately, I am not fully risen by today. Above all, it would be nice to be able to set up your own bookcase better. Perhaps one can and I'm too stupid. But if I have a visually shown shelf and can also move books by touch, it would be nice if you could pull the books in different shelves and they stayed there.
But they do not stop.
Nevertheless, probably the best readers in terms reading. Would buy it again.