My story is a little bit different.
I do not have problem with Xara Xtreme Pro.

But when I purchased plug-in program: Alien Skin Eye Candy 4000 on line yesterday, I could not find any number for Registration code.

I can only guess that the connection for downloading Alien Skin Eye Candy
4000 was cut off several times. It took me 4 hours to finish downloading for unknown reason. But my internet connection seemed OK with other websites.

I have written to Xara X supporting section for help, and got a “Service Ticket Number”. Hopefully, the Registration code will be issued soon. Then I can start working on them.