Using a stolen key violates the software's Terms of Service and supports digital piracy. Safe Alternatives for Free Data Recovery
Never install recovery software onto the same partition where the lost files were located. Icare Data Recovery Software 5.1 Serial Key
Walk through a on how to use Recuva or PhotoRec. Using a stolen key violates the software's Terms
Searching for a "free serial key" or a "license code" for version 5.1 often leads to "warez" sites. Here is why you should be cautious: Icare Data Recovery Software 5.1 Serial Key
As soon as you realize data is missing, stop writing new files to that drive. New data can overwrite the "invisible" deleted files.