photoshop cs6 without internet connection

I have an old version of photoshop cs6 as well as the cc version. I use CS6 on a computer that doesn't have an internet connection and the cc version on a computer that is connected to the internet. Suddenly I cannot launch cs6 on the no internet computer because I'm prompted to login which I cannot do without an internet connection. Does anyone know how to launch cs6 without an internet connection? It used to work but suddenly doesn't.