Registering 1Password 3.8.5 after buying 1Password 3.9?

Hi all,



I'm new to 1Password and downloaded 3.9 from the MAS yesterday onto my Lion equipped iMac - this was the first 1P download and installation I've done. Then I went to download a copy to my MBP running Snow Leopard which of course I can't get from the MAS as 3.9 requires Lion. So, I've downloaded 3.8.5 from the AgileBits website on the 30 day trial, thinking I could use the license info from 3.9 on the 3.8.5 version - but there's no license info with the 3.9 version.



So, how do I register my copy of 3.8.5 on my MBP having paid for 3.9 on my Lion machine?



Any help very gratefully received.



Thanks,



Stu