Before you commit to a lifetime license, CleverFiles lets you test Disk Drill. All you need to do is download Disk Drill for free and you'll have access to the free version of the data recovery application. This allows users to run it on a targeted hard drive and requires payment only if you are convinced that Disk Drill has found and can recover the files you need.
Use the free version of Disk Drill to scan the hard drive for lost or deleted files, and upgrade to the Pro version if you discover the files you want to recover.