Keyclone purchase of 2 or 1

I have looked and maybe I am just not finding the correct wording but my question is this, If I plan on using 2 computers do I have to purchase 2 copies. I am basically going ot have a druid and a warlock, Druid being the main. So do I just purchase a copy for the main computer and have it link to the other system or do I have to have 2 copies to do that. The way it looks is I dont since it is just copying from one computer but not sure. Thanks in advance for the help.

You would need to pay for and use two copies - one for each computer.

Thank you