The link posted above points to a registry key that adds the Datasafe path back to your registry. Not sure what that's good for?

To download Datasafe, go to https://www.delldatasafe.com and find the Download link on the right hand side of the page. Alternatively you could just go straight to https://www.delldatasafe.com/downloads/DataSafeOnline.exe (although that link seems to be moving around some lately).