Same here - Firefox and IE wont' open unless I disable MBAE. Oddly, the one browser I refuse to use (Chrome) opens without an issue. Once I disabled MBAE both Firefox and IE opened without a problem. I've been a user/subscriber since the first MBAE build and, in fact, purchased the full/pro version right after it was offered, thinking this was going to be a great product. No more. After this problem developed (for, what is it now, the 4th, 5th, 10th time ?- I've lost count) I confirmed the issue was MBAE then immediately uninstalled it on all my computers that still have it - I've had to uninstall on my office PC because It no longer starts-up despite multiple efforts to remove and reinstall. I suppose the silver lining is that I knew what to do right away to get my browsers working because, of course, this has happened before and by now I know that the problem is MBAE. Time to find another, more reliable product developed by a more capable company. You guys REALLY need to get it together because based on the conversations I've had with people like me, we've officially lost patience. For for those of you who choose to continue using this product - good luck; you'll need it.