Hello,
If you no longer have access to the old laptop and you are getting a "Too many installs" error message when registering your license on the new one, try entering the numeric portion of your registration code at http://www.nch.com.au/kb/10078.html and try again. If that does not work you might want to contact NCH Tech support at: https://www.nch.com.au/support/index.html 
When installing on the new laptop you also need to make sure you installed the version compatible with your license or you will not be able to register it. NCH tech support can provide you the link to download the correct version if you need it