Development licenses can be reissued to a new domain, IP or directory like regular purchased licenses. Please follow the steps in this article:
I just moved my WHMCS installation and need to update the license. How do I do that?
Please note that we require that development licenses be used for internal testing purposes only. Your development installation of WHMCS cannot be public facing and should be either restricted to specific IP address or should be installed in a password protected directory.