Yes, you need to download a new version of the launcher and redownload the game once more from it. Look for it in the beta forums, should be where the old one was.
Or look for your beta email there should be a link there aswell.
Edited, Aug 16th 2013 8:24am by Manikku
, Level 80 Tauren Druid on Tichondrius
*Insert other 5 80's here* -NOT IMPORTANT- ^ MAIN
Jin Lagun, @ Bodhum