Best way to start with a blank data set?

Best way to start with a blank data set?

I am planning to migrate from QB to Books in January..beginning of fiscal year.  I will probably simply start by setting Account Balances and not bother to import prior years.

Because I have been playing around with Books, I'd like to do the migration into a blank Books data set.

Is there a way to summarily reset all Books data to a pristine state?

Ken