It still works for me. You must be doing something wrong. As long as you don't see the hyperspace animation on screen it won't crash. You have to alt+tab(fullscreen) or minimize(windowed) immediately after talking to Harken, before the animation. You also need to wait long enough for it to finish. I just ran Esseles again and it still works.
It still doesn't work for me, see my game crashes as a run up to Harken to START the final dialogue, its even crashed in the middle of speaking to him. So yeah i dont even get to the hyperspace animation before mine crashes. You tell me what im doing wrong because i seriously dont know.