Re-use already activated licenses on new machines

Common rule is just generate registration key again. You can see that
each generation counted as "activation". Activations are _not equal_
to number of licenses you own. This is just _some_ amount that
_approximately_ equal to real number of licences you really use.
Number of activations can be up to two times more than number of
licenses. This is needed to compensate incorrect activations, or license
transferring. Also, activation "expire" during certain time (several
months).
All that mean that during _normal_ work you never reach activation
limit, and just need regenerate key each time you need this. Sure,
there can be some exceptions, for example when you decide change all your
PC's. In such case just contact us to explain situation and we will
reset your activations. But this happens _very_ seldom (really one
time during entire product live).