In case, you do not get any registration form, follow the steps below:

1. Go to Amibroker folder (Generally C:\Program files\Amibroker).
2. Find the “.Net for Amibroker” folder.
3. Right click on “.Net for Amibroker” folder and click on “Properties”.
4. Go to “Security” tab and click on Edit button.
   
5. Select “User” and “TrustedInstaller” from list of Group or user names and click on Full control on Allow side. Click on Ok button.
6. Click on Advanced button.
   
7. Click on Change Permissions button.
   
8. Select “Replace all child object permissions with inheritable permissions from this object”. Click on Ok button. It will ask for confirmation and click on Yes button.
   
9. Click Ok button on all windows.
10. Now, Run the Amibroker and execute the protected AFL.