provisional licence expired

I had a programmer develop an app for me, however when I try and launch the app it says the provisional licence has expired..I can't get in contact with my programmer...I assume it means the provisional apple developer licence expired ? how canI get my app to launch and re-new the licence ? do I need to become an apple developer ? in order to make this happen and get my own licence ? thanks - i.haig@rmit.edu.au