I have used Karteset for years. Now I have a new computer, but Metalgrass is trying to get me to pay again. How do I get around this, please?
The only way to avoid another payment is to deauthorize the application from the old computer and then install it on new computer and activated it as you've done it in the past. If the activation is based on the hardware ID, you will need to contact them and provide the new hardware ID then you can register it.