Lighting not rebuilding. SWARM: "Error: A 32 bit processes cannot access modules of a 64 bit process."

Purchased the engine and got the same issue, spending my afternoon on it, not fixed yet. It will be nice to know what version of the framework do I need cause It doesn’t work with the 4.5.1 / 4.5.2 / 4.5 , no problem with the Unreal 3 SwarmAgent. The reinstallation of these framwork version does nothing for the moment.