Adding Rekordbox to a laptop..

Hello all.....I'm looking to find out what hurdles I may have putting Rekordbox on a 3rd laptop....in other words. Is there a limit as to how many devices I can put a legit version of Rekordbox on? at the moment it is on my iMac and my older Macbook

The macbook that it is currently on right now is going to be taken in for some service soon, so I want to be able to put Rekordbox on my newer laptop and continue my music library management on this one....

Thank you in advance