You can change the serial number from the Help menu of most products.
- Start your Autodesk software. 
 - Follow one of these paths in the Help menu (the path may vary by product): 
- Help > About 
 - Help > About 
 - Help > Autodesk Product Information > About 
 
 - In the About window, click Manage Licence. 
 - In the Licence Manager window, click the arrow next to the product name to show licence details.
 - Click Update (next to Serial Number).
 - Enter your product serial number and click Activate. 
 - In some cases, you may need to restart your software to view the updated serial number. 
 
Note: For a product collection with a single serial number, you should update the serial number for each product in the collection.