I am not authorized to send you the path to the Shroud of the Avatar Patcher download.
You will received an email from Portalarium describing the next Release...which will be Release 4. In that email will be something like this:
RELEASE 4 INSTRUCTIONS
Setup:
Download and run the PC SotAInstaller.exe here:
Since there is no way I can find out if you did indeed buy the Adventure package, I can't provide that link...sorry.
Wait for the email from Portalarium. Don't forget to check your email Spam folder.
TQQdles™