I have a damaged MDF file that needs repairing. I downloaded the demo version of your recovery tool and could see all tables and many records in some of them. To save the results I bought the personal version (please see the key below) and re-run the application against the same file. This time I was able to save the results but ALL the tables were empty and I couldn't see any of the information.
Answer:
It is possible that something additionally happens with your MDF between tryout and registration (recovered by other software or something else). You can check it by running the demo version against this file on another computer.