The main thing to understand is the difference between the strategies:
? Follow the followers. Input a competitors accounts, and follow who follows them. This can be good, but there is a danger of following junk accounts.
? Follow the follows, follow all the accounts another acccount follows. Usually a little safer than above!
? Industry or job title search. A much more filtered strategy.
The "Can we temporarily unfollow your existing follows?" check box.
The ZenLikeFocus algorithm adjusts your follower/follow ratio to get the best chance of accounts following you back. If you want the account back to it's original state before ZenLikeFocus, just click on the default "Return to original" Strategy (you will keep all your new followers). If you don't want your existing follows unfollowed, set this option to "no".