The v1 license will be valid forever. You will get all future v1.x updates for free.
v2, v3... upgrades will be paid, though.
For each license of Skatter, you can install it on no more than two computers, provided that it is used on only one computer at a time.
You will be able to activate Skatter on five different computers in total (for instance, if you buy a new computer and uninstall Skatter on the previous one). One single computer can be considered different if its hardware is changed in a significant way.
If you wish to activate Skatter after having used the five authorized activations, you will need to contact email@example.com.