Hi, I have found this,
Have a look at this web site by Doug Knox
and download the LNK (Shortcut) File Association Fix (Restores Default Shortcut Behavior)
Unzip the file and double click on it. When prompted do you want to merge... select yes, Ad-watch will then notice the change and prompt you as well. Make sure you except the change in Ad-watch as well.
If this fails download the EXE File Association Fix (Restore default association for EXE files) fix from the above web site and follow the instructions at the top of the web page to start regedit from Task Manager. Once Regedit starts select file then select import and browse to import the LNK and EXE fixes you have downloaded. You will need to unzip them first.