I have a paid UI Browser app that runs fine on macOS 10.15.
I have an application I want to use it with that runs on macOS 14.5 - but not 10.15.
How do I move the license from the 10.15 device to 14.5?
From the UI Browser main menu, choose License–>Deactivate. My copy says that the license key can be used on three computers at the same time, so maybe you don’t need to move your copy from 10.15, but simply use the same license key on the 14.5 machine. But if not, presumably you can deactivate 10.15 setup from this menu and enter the key on the other system.