So I was playing just fine earlier today and when I exited the game. Couple hours later I come back, click on the game and it asks me to log on ingame but there is no option to "log in with steam" just "log in as guest" and I tried putting the username and password but it said to logon through steam which I was doing and yet there is no option ingame to do so.

How do I fix this problem?

Thank you.