recovering backed up image with free version

No matter what I do the program tells me that it only supports the recovery if I upgrade.

How can I recover data from a backed up partition? Is it possible at all?

(The issue is a bit more complex: I have a new system on, and would only need some data from the backed up version; that means extracting it to an external hard drive, as I do not wish to jeopardize my present system by overwriting it with the complete C: backup...)

Thank you