If you have forgotten your license keys while installing after a few days or for a new computer installation then there are many ways to get back the keys:-

1. Inside Your WarriorPlus Purchase History

You can view your license keys from warriorplus itself. Note that this does not apply to other marketplaces like Jvzoo(in case you purchase from there)

2. Downloads Section of Your Dashboard

Once you login to the site then in the downloads section of the dashboard you will be able to find the keys.
The URL to login to your dashboard will be :-
madhatmarketing.com/dashboard

3. Purchase History of The Email

As soon as you make a purchase, you will receive a purchase details email and in this email you will be able to find the license keys.