There are two ways to do this:

Floppy disk Authorization:
- Only Imation USB Superdisk and Newer Technologies Udrive are compatible.
*The VST USB drive is NOT Comaptible
- the USB Floppy Enabler is also required. It can be dowloaded from paceap.com
Challenge/Response Authorization: (I use Vision DSP 4.22 in this example)
*YOUR PRODUCT MUST BE REGISTERED TO RECIEVE THE RESPONSE
-Download VisionDSP 4.22 and VisionDSP 4.22C
-Remove the VisionDSP Application from the VisionDSP 4.22 folder
-Drop VisionDSP 4.22C into the VisionDSP 4.22 folder
-Launch VisionDSP 4.22C - copy the Challenge provided
-go to www.opcode.com and fill out challenge resonse form
*Opcode will send response withing about 5 days. you can use this version for 30 days before having to enter the response.