Hi there,
I wanted to give skinning a try on Windows 7 Ultimate, so I downloaded WindowBlinds 10.5 from the official website to try. (As an aside, the installer still reports the program as version 9.5.1.0, so that might need looking at).
Upon running it for the first time, WindowBlinds customization window loads, and then a modal dialog appears over it to force me to make a choice: either to enter a key, buy now, or start a 30-day trial, as shown in this screenshot:

Pressing the Enter Product Key button does nothing.
Pressing the Start 30-day Trial button does nothing.
Pressing the Purchase Product Key button attempts to load the Stardock website inside the tiny modal dialog as shown in the screenshot below. This web view is virtually unusable. Some links are clickable, but none of the website's CSS or JavaScript loads.

So now I'm stuck unable to use WindowBlinds. I can't even close it without using the task manager to kill it. I have also tried restarting Windows, uninstalling and resintalling the program, with the same results every time.
Not a good first impression, but perhaps Stardock staff can help me work around this issue so I can at least decide whether to buy it or not.