If you have different registration codes on the Paratext Dev Server and on the Paratext Production Server and want to easily switch between them in Paratext without having to change your registration then

1. Go to the dev server's registration page (https://registry-dev.paratext.org/registration).

2. Click "Unregister".
   That will bring you to the screen where you can re-register.

3. Click "I already have a Paratext 8 registration code".

4. Enter your code from the production server.

You will need to repeat this process if your registration code on the production server ever changes. For security reasons, it does not work the other way around—the production server will not accept codes generated by the dev server.