Try to uninstall again. Go to control-panel Add or Remove programs. if
nothing there, check the windows registry.
As for good download manager, there are quite plenty out there such
as: Getright, Flashget, download accellarator, download studio, etc.
They ranges from containing spy-ware, unreliable, slower than nothing
having them, etc.
The one that I love most is "download studio" at
www.downloadstudio.com, not only they are reliable but also complete,
which enable u to do web-grabber, file-grabber, screen-capture in
video, photo-printing, etc.