How to find first day of business using AllProWebTools?

We are trying to pull the lifetime value of a customer report...the console is reminding us that in order to show true "Lifetime Value" set the date range to begin with your first day in business...where in the AllProWebTools settings can we find our first day of business using AllProWebTools so we can pull lifetime sales data in it's entirety?

Your first sale to a customer with AllProWebTools was on 2010-10-18.

great thank you!