OK... be glad to try:)
First, if you have the trial copy of WB, uninstall it after saving your Aero Theme and applying it BEFORE you uninstall the trial copy.
Uninstall the trial using CCleaner which is free on the net. HERE . Use the link on the right upper part of the webpage. Then reboot.
If you've installed Impulse, then sign in using your email (that you used to buy WB) OR scotsdavy1 and as your password, use whichever one you currently use to sign onto WinCustomize.
You'll notice a small circular spoked wheel spinning on the right side of the top bar near the blue question mark. Wait til it stops.
Then open the "My Software" tab and WB should appear as available for download.
A good source for a "How to Use" for Impulse is HERE .
After installing Windowblinds you should reboot.
Then start downloading skins, and enjoy it!