Yes, you are welcome to download FREEWARE version of the software before purchasing it. The freeware toolkit may be accessed from the Downloads page.
It is a fully functional version which allows to recover partitions in DOS environment, as well as to scan, detect deleted/damaged partitions and preview files on them. To recover found volumes in place you may purchase the software and use registration keys to activate the freeware version.
Active@ Partition Recovery FREE version is a freeware toolkit, and it does not have expiration period.