You have Business license (5 domains) for MiniMax. So, you can use it in 5 different sites.
Here is the link to TACs https://wpeden.com/terms-and-conditions/ (From footer ) Check section 2 there, you will find your answer.
Bottom line is Upgrades are provided for a term of 1 year from the time of purchase. After 1 year a new license will need to be purchased in order to continue receiving support and product upgrades.