uTorrent not "installing"

[stickfigure]

In Vista 32-bit here. During the initial execution I was stupid and hit cancel by accident. Now, uTorrent is not installed fully in the system. it doesn't show up in add/remove programs, and there are no other shortcuts. I decided to install it again, but it just opens the actual software, when i click on the install file. it gets annoying because windows thinks it's an install file, so it gives me a security warning every time i open the .exe, though it doesn't install. I know the software doesn't store many entries in the regitry, but which registry entry would make me able to reinstall it, so it thinks that it's my first execution of the file? thanks!