If I want to upgrade Active-HDL, from where can I upgrade latest version?
You can find Active-HDL latest version at the following location:
Go to http://www.aldec.com/support and log in to your account (you need to create one if you don’t already have it)
Click on “Support” link at the left upper corner.
Click on the Active-HDL tab.
Go to “Downloads” section and click on “Currently shipping Version Downloads – Active-HDL latest version” link.