You would not believe what fixed the problem. If you have LW quitting while loading the HTML Engine make sure that you have Helvetica and Times New Roman loaded and active.
I have been busting my butt trying to figure this out. Frostwire did the same thing to me. My good friend suggested the font issue (I should have known) and Dude! it works great now.
Macs and fonts, one of the few issues we have!