cdunleavy, in order to get the updated version of the Windowblind, if that is what you mean, you would either contact vstyler, or use the original link from which you originally downloaded it. The link would point to the updated version.
If you bought it via Wincustomize, it'll be in your registrations.
If you bought it via Maxstyles, you should have gotten a link in an email which will allow for 5 downloads. Either will get you the new version without paying again.
If you bought it from Maxstyles and lost the email, send maxstyles an email and explain. I'm sure you'll get satisfaction.