Yes , but moreover the trial version you have is somewhat crippled. Not all skin features are enabled. I strongly suggest you purchase the full registered version of Windowblinds. It's only 20$, and you were to buy only one software in your life, make it Windowblinds!

(hey Brad, can I get a commission on that? hehehe!)

If you have a credit card, you buy it online and you will be able to download the full enhanced version. The purchase is in US dollars, but your bank will do the conversion and send you your bill in your own currency.
this http://www.windowblinds.net/default.asp?page=register will bring you to the order page of WindowBlinds. If you don't have a credit card, they also accept checks or money orders in US funds (no Eurocheques, please, as they are not certified funds). Just print and use the order form at https://www.stardock.com/order.txt and mail with payment to:

Stardock Systems, Inc.
17292 Farmington Rd.
Livonia, MI 48152
USA

I hope this helps you.