reinstalling is a bit overkill - just drag it back in!
drag it to your start-button, wait for start-menu to appear.
then drag it over 'all programs', and again wait for list to open.
then drag it where you want - if you want it in a specific folder, hover over the folder name for a short while and the folder should open up >> let go of mouse button.
OR, right-click the desktop shortcut >> cut, then right-click on 'all programs' >> open >> navigate to folder >> paste