Once you enter the activation code, you should never need to re-enter it again on the same computer. The first computer activated is considered the primary user.
Note: If activating on a second, or third computer; make sure to use the same Activation Code, Password, and e-mail from the first computer (i.e primary user).
Here's a good link which should really help, https://numericalinnovations.freshdesk.com/discussions/topics/14000003428
Not much luck with this ....
Following the link above, brings me to the page where I paste the code from the mail, enter my password and click on View Info => the info I type is cleared and nothing else happens.
I really need to be able to work from my home computer too, but so far only the one at work is running Fab3000.
The info above could be a lot easier to find, it should be permanent on the front of FAQ.
Please create a support ticket and send us your activation code, and we'll be happy to review.