Auto Wallpapers will change wallpapers as your settings. It will popup a window to tell you register at sometime. But there is no any limit to function and no expiration, and the popup window will disappear after register.
Main Features
1. Auto change wallpapers: you can set an interval to change wallpaper continually and also can set sometime to change it.
2. Auto shut down computer: you can set computer auto shut down or hibernate etc. at sometime.
3. 5 kinds of layout: give you more choice.
4. 3 kinds of display sequence.

The license of this software is Free Trial Software, the price is $20, you can free download and get a free trial.