Hi, do not upgrade from .NET 4 to .NET 6 with our existing products, you need to leave them at the default setting, what you are seeing is a warning, the product will continue to work as before, but we will publish an update to remove the warning.
I am unsure what you mean by refuse to activate, can you tell me more about this.
I just tested the product on CT 4.2.4 and it is working correctly, we will remove the warning messages.