Just having dealt with another user getting similar results, the problem was the missing Polystyle folder that belongs in the root directory of his ME install.
There are two Polystyle folders. One that belongs in the Addons folder and contains 3 files: Install.lst Polystyle.dat Polystyle.s. The other Polystyle folder (which is the one you would replace with the IDE Integration download from the Polystyle Download page[/url:1f1ipkg5″>) belongs in the root directory, i.e. <ME_Install>\Polystyle and which contains the actual program. Once we downloaded and placed that folder in the proper place everything was good to go.