When you initially download Disk Drill, you are obtaining the "Basic" version. This allows you to scan drives and preview recoverable files. However, to save the recovered data, you need to upgrade.
This version is only suitable for:
Understanding the technical requirements for Disk Drill Professional 4.2.567.0 is important. You can find this listing under "Technical" on various software aggregators. Disk Drill Professional 4.2.567.0 -x32 x64--Mul...