@Op, in the output file I have several #targets, is that what we are looking for? How do I derive the private key now?
You should only have 1 target in output file unless you ran the program more than once with same output file.
The target key is the original public key you used in the settings.
To derive the private key you need to search whatever range/bits of your original public key used to generate all of the offset keys in your output file.