right click my computer
select explore
click on C: drive
Click on programs
if it is still showing in the add/remove program then it must still be located in this folder somewhere. Search the folders for the correct name...sometimes they install it under a different name such as the manufacturer's name.
Once you locate the folder open it up and look for the set up and double click it. It will reinstall the program to your system and place a new shortcut to your desktop.