I Can't Open the Attachment

This article applies to the previous 4.01 version and older.

The new version sends your activation email automatically and immediately via an auto-reply.

Please update to the current version, which is the new minimum requirement for activation and support

Open a ticket here at the helpdesk to find out how.

You aren't supposed to open the attachment. The program does that.
You will not do anything directly with this file (for instance double clicking, drag onto icons to launch, etc)

Go back and read the Installation and Activation Guide for specific instructions about applying the key.