I am thinking, if you are recieving this message, Impulse is not gone.
Delete that Impluse_setup.exe file and download another one.
As I have already stated, I had downloaded the file a total of three times to no avail.....
But you are correct. Even though Impulse did not show in Add/Remove Programs, or 2 other uninstaller programs I use. Even though the Impulse folder in Program Files\Stardock was empty, and deleted. Even though I had deleted all references to Impulse from the registry, and anywhere else I could find it, Impulse was not gone.
I downloaded Revo Uninstaller, and there it was in the list of installed apps. Revo searched the registry, and hard drive for all leftover information, and found plenty. Info that I would have never found myself, because most of it was just a bunch of numbers. None of it appeared to have anything to do with Stardock.
After Revo finished cleaning up the mess, I was able to reinstall Impulse.
Revo Uninstaller gets a big THUMBS UP from me!