Nebulb uses information from the hardware of the computer on which it is installed to control that the same license cannot be activated on more than 2 computers.

That said, there is no problem if you renew 1 of the 2 computers on which you have Nebulb installed (or even both) and install it on a new computer. This is quite normal.

To do this, you simply have to do what is explained in the following article: