I dont know what you guys are talking about here, which is rather mysterious if you ask me, software surely does work a wonder. Before I downloaded the updates, I read the forums about the problems and everything and became a bit hesitant. But when I used the upgrades, everything was fine and fast! Except for some minor issues I figured out on my own. Better than V1 anyways, with all settings at a medium level.
Perhaps in this case on this particular thread, maybe it's conflicting with something with DBPro, maybe a piece of code you've written or some kind of exe, although I'm not a programmer, so this is only a hypothesis.
Another way to make the games faster is editing the textures provided, ie. lowering the resolution, if you have photoshop, use the cutout filter, etc.
Also the amount of lights placed in a level affect the performance of the engine as well. Place the lights carefully.
The best tip I can give you is changing most of the entities to 'static' entities, NOT all of them. Still use physics to a great advantage. In my opinion, I don't think it is necessary to have EVERY single entity dynamic. For example, you can have a bunch of stacked barrels that are static, and a couple of dynamic barrels on the ground that you can move around.
Straight outta compton