A licensed application will not run without a valid license code. However, it may be delivered and installed without a license code.
If the application is using a locked license, then you need to provide the locking code of the system to the vendor. Using which, your developer will generate a license code. Contact your vendor if the license code is not included with the product. Your vendor will then give you the further instructions on how to proceed.
If your previous license code has expired then you need to get a new or upgrade license.