How to expand the number of use of trial software,, NOT the time or date but the numbers of use?

I bought a software game and paid 20 dollars online,, I know it is not too much but this game according to my license is used on 2 computers,, it is ok for me,, but every time I format my computer or unistall the game for any reason,, I have to reinstall the license code which I have,, then reactivate on net or phone,,, last time a messege appear that this license is activated more than it is to be and can not be activated again,, this is not logic because It is on the same computer,, this game is now on trial use for 3 times only,, and when I used it 3 times,,, I must buy it again,, is there any way to reactivate it and use infinity and not to buy what I own again?