I want to use the removal tool, because if I install 5.1.864 upon to 5.0.677 I will have some serious problems. I have understood, that I can avoid these problems by uninstalling 5.0.864 and installing 5.1.677 from a scratch.
Anyway, does the removal tool remove something, what the normal Windows uninstaller doesn't (I mean the folders and the registry entries)?