If you have secured a copy of the software, here is a quick guide on how to operate it:
If you see your lost files, you must buy a license key to save them. This unlocks unlimited recovery.
Let me be direct: There is no legitimate “full” version of Power Data Recovery 4.1.1 available for free on FileHippo or anywhere else. The official distribution model is a trial version (which shows previews but doesn’t save recovered files beyond a small limit). Any site offering a crack, keygen, or pre-activated “full” version is almost certainly distributing malware.