For my 2¢, I would say forget about it with your present rig. Of course, there is boat towing and there's boat towing. If you're not going very far and it's just to dump the boat in for the season, I would think you could squeak by. If on the other hand, you will be towing the boat several times a year. get something else, especially if there are hills involved. I have a Flex ECO pulling a smaller boat (probably around 3000 lbs or more including the trailer) and it pulls the boat fine. However, I definitely think I would be better served IF I had electric trailer brakes. The trailer has inertia brakes which I question. If I have to stop quickly, I need plenty of room. More than once, my heart started beating faster when I wondered if I would be able to stop. So, I don't go too fast and try to leave plenty of room in front in case I do have to hit the binders.
I don't know what kind of boat you have, but 3,600 lbs seems to be light for a 24' boat if the trailer is factored in. Then, there's the liability. If you did have an accident, you can bet if any lawyers are involved, the suitability of your tow vehicle will probably be brought up, especially if braking is an issue. I would also think with a 24' boat, the trailer would be at least 26'. That's a lot of length behind the relatively short Edge and I would think it would sway enough to make you hold your breath some times.
IMHO, get another tow vehicle.