Can't enter license key

Just bought 4.x. Downloaded app to mac. loaded into applications. Can’t find a place to enter license so I can’t open app and use it.
Need some help on that pretty fast.

When you open the app unlicensed it will aks you for either buy it or enter a license. You may also enter the license in the License Manager by clicking the menu item “FotoMagico > Licenses…”. What happens if you start the application?