as far as the problems go:
when you hit the program and it reners the 3-D image, PDN isn't frozen, the problem is that the interface doesn't load, but for some reason the program thinks that it has. there is nothing wrong with PDN, or teh plugin, it just seems that there is some sort of mixup between the plugin, the program, and your system.
unfortunately, it only happens with some systems, mine being one of them. while I am not a computer expert, I have been looking through my computer trying to figure out what the cause is. If I can figure it out, I'll let yall know.