Data recovery requires absolute trust. You are giving the software deep access to your failing storage media. If the software is legitimate, it tries to read your data. If the software has been cracked or patched by a hacker, it contains modified code.
If you suspect your DMDE is corrupted by a previous crack attempt, clean it out: dmde license key free fix
PhotoRec (included in the TestDisk suite) is open-source and completely free. It is legendary for "file carving"—ignoring the file system and digging through the raw data on the disk to find file headers. Data recovery requires absolute trust