That program is a recovery program, designed to recover data from the hard which has otherwise become inaccessible.
There are tons of reocvery programs out there...they are not all created equal.
There is a free version of the software...from what you state, you seem to have trial version of the paid program.
Other programs you may want to try:
Recovery Software, Partition Table Doctor - http://www.ptdd.com/
Recuva - Undelete, Unerase, File and Disk Recovery - Free Download - http://www.piriform.com/recuva Easeus Data Recovery Wizard