Hello Masucci108 and welcome to the forum.
You can have IK software installed and authorised on upto 3 computers at any one time, as long as all the computers are yours, you are only using one at a time and you don't sell the machine on with the installation/authorisation still in place.
Here's the terms from the
EULA"You may install and use the Product, or any prior version thereof for the same operating system, on up to three (3) computers, provided that (a) each computer is owned by (or leased to) and under the exclusive control of the Licensee; (b) the Product shall NOT be used simultaneously on more than one machine, and (c) any computer(s) with the Product installed shall not be sold, rented, leased, loaned or otherwise be removed from the Licensee’s possession without first removing (uninstalling) the Product, except as provided in Paragraph 4.5 (below) pertaining to “Software Transfer”."
Hope that helps.