If your downld files are inside your LW program folder, then I would remove them before reinstalling if that's what you want to do. Otherwise you'll lose them. Normally the default save location for downlds is: C:\Documents and Settings\"your account name"\Shared

The default location to install LW program is C:\Program files. So you can see that normally the directory locations are totally different.

How many incomplete folders do you have? Search the word incomplete on your computer. See which ones have any files inside them. And then check their location. The incomplete folder in your C:\ may well be empty & is not being used. If that's the case, then the answer is simple, delete it. Whichever incomplete folder has files inside is the one you're using. Which drive is it on & what's its location?