With this beta update we have found that updated servers are NOT being displayed in the server browser. To connect to a server before we get this fixed please do one of the following:
1) Join an IP listed here by a fellow tester or server host!
2) Join via your recently played list
3) Join via your friends list to those already playing
4) Join via steam friends list to those already playing
We are looking into this issue now. Once again thank you for your patience in this beta.