YES! If you purchase a Kit from the Unity Asset Store, you will be eligible for a free upgrade for the other format. After you purchase the kit, just go to the page for the other format and it will be available for free (see example below).

Of course, if you prefer the flexibility of having all of the file types we support, it's best to purchase directly from us at www.kitbash3d.com. Any purchases you make from our site include all relevant file types for that kit, downloadable from your "My Kits" page when you log into your account. Please note that since we do not receive customer or order information from the Unity Asset Store, we cannot provide access to purchase you make in the Unity Asset Store on your KitBash3D account.
​