If you bought a copy of Family Historian 6 (full boxed version) at RootsTech London, in 2019, you will have received a coupon for a free upgrade to version 7 when released. To claim your free upgrade, go to the store and add a copy of “Family Historian 7” to your basket. Then proceed to checkout and use your coupon on the checkout page to get a 100% discount (that is, a free copy).
See Installing Version 7 for details on installing the program.