For each (software?) product you have 10 authorizations (more generous than some other manufacturers).
IK Multimedia will not reveal the exact details of the authorization parameters. But adding hardware may require a new authorization.
But
(a) in the IK Product Manager you can Unauthorise a product
K Multimedia provides 10 authorizations for each product you own. Check your authorizations left in the software tab, below the product name. Conversely, if you want to unauthorize a product you own, simply click on the “Unauthorize” button. A dialog will appear asking if you want to confirm unauthorization.
(b) If you do manage to use all 10 authorizations, then, all things being reasonable, IKM Support will reset the count back to 0.
So, no need to worry.