Could someone please advise a 75 year old "numpty". I have read on here that you are permitted to install BIAB 2019 on 3 different computers. As I am about to go away for a wee while, I thought I would put BIAB on an I5 Laptop. Installation went well, but, I cannot get it to activate. Must I release the serial on the "main" machine and then activate the "secondary" copy and reverse the process when I return? Any pointers would be gratefully received. Thanks.

Maurice.