As I mentioned in my previous post, you will need skinstudio to adjust the skin properly. You can download skinstudio via your product account page: https://store.stardock.com/myaccount/products. Download Skinstudio 11 and install it.
BTW which preview you're referring on this statement?
It is confusing though, because if you load Aero 11 in WindowBlinds and click on the image to view the screen preview, the taskbar is transparent there, ie I can clearly see the details of the wallpaper through it.
Thank you,
Basj,
Stardock Community Assistant