I didn't want to come on here and moan but you don't seem to provide an email address so am having to! Sorry!
I just tried to register Boom 2 and not only was it not having my code but it also threw up an unhelpful message that seemed to tell me I had stolen the software and that I should go buy a copy.
A link on there to contact you would have been good at least, even if you do think I'm a thief!
Anyway, I then came to your website to try to find an email address to contact you. There didnt seem to be one but there was this forum.
I've looked at your FAQs and all it says is that I should "...use the lost license code form to send the required details." Which is fine, but there was no link to the lost license code form, nor any details of where it may be.