I have done exactly what has been told in the thread, but you want to know something? It did not work. Now it is stuck on "Installing Main Assets 100 (0%)" instead!
I also followed the above after having my "main assets" download freeze at 29%. After updating the launcher, it started downloading, and is now stuck at: Installing Main Assets 100 (0%)
PLEASE FIX YOUR GAME RATHER THAN JUST ADD CRAP TO THE CARTEL MARKET.