for me it was all trial and error.
It does have some fun features like finding ecm keys if you have a valid emm(option in the tools tab on the left side of the screen)
If you have valid emm key(s) you can find the ecm keys in less than 1 second.
I was making the mistake of deleting the emm.key and pattern.key files after each episode,these should be left alone,the program adds to them.Once you find keys you can use the pattern.key file to find keys in the future,that is an option in the regular home edition screen-last choice I think in the method of attack.