First I don't use the BreachGuard product, so I can't speak from personal experience. I'm not even sure there is a Free version of BreachGuard, possibly you downloaded a trial, for which payment would be required to continue with it after the trial.
I don't believe the program can just delete these accounts from within the sites as such. I would image that you could remove these email addresses from within BreachGuard or add an exception.
I would have to ask how they managed to check for these email account anyway, unless they are all related to your existing email address (don't publish it) used on different sites ?