Did you misplaced the keys of your software ? do you want to format your computer and want those keys to be backed up ? MyKeyFinder can help you to find the keys of the installed software.
It Scan for the registry entries and will find all the keys available in the registry
It displays the result in a clean list which you can print or export into PDF file.
I must say that it won’t display all the software keys you installed, but they will update the signature and you will get more and more keys 
Read more and download AbelsSoft’s MyKeyFinder 2013 from here